Holiday Motor Corp. v. Walters , 292 Va. 461 ( 2016 )


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  • PRESENT: All the Justices
    HOLIDAY MOTOR CORPORATION, ET AL.
    OPINION BY
    v. Record No. 150391                              JUSTICE ELIZABETH A. McCLANAHAN
    September 8, 2016
    SHANNON B. WALTERS
    FROM THE CIRCUIT COURT OF THE CITY OF ROANOKE
    William D. Broadhurst, Judge
    Holiday Motor Corporation, Mazda Motor Corporation, and Mazda Motor of America,
    Inc., (collectively “Mazda”) appeal from a judgment entered on a $20 million jury verdict in
    favor of Shannon B. Walters, who sustained a serious cervical spine injury when her 1995
    Mazda Miata convertible overturned while she was operating it with the soft top closed. Walters
    contends she was injured after the windshield header disconnected from the top and collapsed
    into the occupant compartment. She asserts that the design of the soft top’s latching system was
    defective because the latches connecting the windshield header to the top were not designed to
    stay latched in a foreseeable rollover crash.
    Mazda argues it had no duty to design or supply a soft top that provided occupant
    protection in a rollover crash and that, in any event, the opinion offered by Walters’ expert that
    the soft top’s latching system was defectively designed lacked a sufficient foundation. We agree
    and will reverse the judgment of the circuit court and enter final judgment for Mazda.
    I.         BACKGROUND
    A.      Facts Surrounding 2006 Rollover Crash
    In June 2006, Walters was driving her 1995 Mazda Miata convertible along Virginia
    State Route 619, a two-lane highway in Bedford County. The Miata was equipped with a soft
    top that could be folded and stowed for open-air driving or unfolded and closed by connecting
    the top to the windshield header (the curved steel bar running across the top of the windshield)
    by latches located on each side of the vehicle. 1 Walters was operating the Miata in the closed-
    top configuration with the latches engaged. Walters observed a large object that “basically
    covered [her] whole lane of travel” come toward her from the back of a pickup truck she was
    following. Seeing no traffic in the oncoming lane, Walters veered left across the road, off the
    highway, and up a slight grassy incline. The vehicle overturned and landed on its top with the
    driver’s side pushed up against a tree. Walters testified that she did not lose consciousness
    during the accident and that her “first memory” of what happened was that her body was “light
    as a feather.” She recalled having pain in her head, neck and right arm but could not feel or
    move her legs.
    Michael Evans, who was also travelling on Route 619, came upon the same object in the
    road, hit his brakes, steered left, then pulled his vehicle onto the grass when he saw Walters’
    vehicle “up on the bank.” 2 According to Evans, Walters’ vehicle was “inverted, on its top, up
    against the tree,” which “was against the driver’s side.” Because the vehicle was “resting on a
    slope,” the driver’s side “was closer to the ground than the passenger side.” Evans testified that
    the “back of the convertible bows,” or the beams across the top, “appeared to be holding the
    vehicle up, but the front of the hood and windshield . . . were flat on the ground.”
    Because Evans could not enter the vehicle through the driver’s side, he broke the glass
    out of the passenger’s side window, reached through the window, and opened the passenger’s
    1
    Each latch consists of two halves. The handle half of each latch is bolted to the curved
    steel bar at the leading edge of the soft top and the striker half is bolted to the bottom of the
    windshield header. To connect the latch, the handle is rotated so that a draw bar engages the
    striker and pulls the latch halves together.
    2
    Evans testified that the object “look[ed] like a huge blue mattress” and he “later found
    out that it was a swimming pool.” The driver of the truck carrying the swimming pool did not
    return to the scene and was not apprehended.
    2
    side door. He then crawled into the vehicle and turned off the ignition. 3 At that time, he noticed
    that the windshield header was separated from the soft top such that the top “was actually
    underneath of the windshield.” Evans cut Walters’ seat belt and lowered her to “where she was
    flat on the top.” He then cut out the vehicle’s acrylic rear window and crawled into the vehicle.
    He observed that Walters “had a head injury and was bleeding from like the top of her forehead.”
    Because Walters told Evans she could not feel her legs, he was reluctant to move her. Evans
    held Walters’ head stable and remained with her until emergency medical personnel arrived on
    scene.
    B.     Allegations Against Mazda
    In Walters’ second amended complaint, she contends that Mazda Motor Corporation and
    Mazda Motor of America, Inc. were negligent because they designed, manufactured, and placed
    into the stream of commerce the Mazda Miata convertible model, which was unreasonably
    dangerous for its ordinary and/or foreseeable use “in that it would not provide reasonable
    occupant protection in a foreseeable rollover while being used in its closed top configuration”
    due to defects in the “design of the A-pillar, windshield header, and the roof latching system”
    and in failing to warn of such danger. 4 Walters also contends that all defendants breached their
    warranties “that the subject vehicle was reasonably fit and safe for its ordinary and/or foreseeable
    purposes” and “was of merchantable quality throughout” for the same reasons. Walters claims
    that her injuries were proximately caused by these asserted acts of negligence and breaches of
    warranty.
    C.     Walters’ Expert Testimony at Trial
    3
    A birdcage containing kittens had been sitting on the passenger’s seat. Evans removed
    the overturned birdcage from the vehicle before he crawled in to turn off the ignition.
    4
    Mazda Motor Corporation designed and manufactured the vehicle; Mazda Motor of
    America, Inc. distributed the vehicle; and, Holiday Motor Corporation sold the vehicle.
    3
    James Mundo, an automotive engineer, was qualified as an expert witness in “automotive
    engineer crash management, safety management, including latches.” 5 Mundo testified that there
    are three primary “load paths” that make up the structure of a “closed-top vehicle, a sedan kind
    of vehicle.” The first load path is the frame of the vehicle. 6 The second load path is “the side of
    the vehicle” to “carry the load for components that would be on the sides of things for the car.”
    The third load path is the “windshield area of the vehicle.” These three load paths “carry the
    loads in the vehicle” and “if any part of this structure is disconnected, then it doesn’t work as a
    system anymore.” Mundo stated that when the load paths don’t work together anymore, the
    results are “unpredictable” from an engineering point of view “if you get in a crash.”
    According to Mundo, a convertible vehicle (as distinguished from what Mundo described
    as a closed-top sedan type of vehicle) may be converted “from a three-load structure to a two-
    load structure.” When a convertible is in a closed-top configuration, the latches are “the
    mechanism by which this roof is locked” so that the third load path is “continuous.” When the
    “latches are connected, the design objective is [to] have a continuous load[,] three load path.”
    Mundo explained that automotive design engineers use a “right-hand rule” to guide their
    design of all automobile components.
    5
    Prior to trial, Mazda filed a motion in limine to exclude Mundo’s testimony, which was
    denied by the circuit court. At trial, Mazda interposed objections throughout Mundo’s
    testimony, many of which were overruled, and moved to strike his testimony at its conclusion.
    The circuit court took Mazda’s motion to strike the testimony under advisement. After Walters
    presented her evidence, Mazda renewed its motion to strike the testimony of Mundo, which the
    circuit court continued to take under advisement. The circuit court ultimately denied Mazda’s
    motion after Mazda presented its evidence. The circuit court also denied Mazda’s motion to set
    aside the verdict, in which it asserted that Mundo’s testimony should have been excluded and
    stricken.
    6
    Mundo described a “load path” as an engineering concept referring to “a particular
    path” to “carry the load.” For example, according to Mundo, the frame is a load path because
    engineers “can depend on [the frame] to “tie things to it” and “put the load.”
    4
    [E]ngineers have a coordinate system that’s established in the design of an
    automobile, and it’s called a right-hand rule. And what this is[,] it’s the
    coordinates for the vehicle. And the thumb here is the up and down, the
    index is front to back, and the middle finger here is cross car.
    And so whenever we are talking about vibration, 7 when we are talking
    about the vehicle moving around, we can go to any component, any part of
    the car, any beam, any latch, and we can put the right-hand rule, put that
    there and say, “Is this thing moving in three cardinal directions, or is this
    thing not tied down in three cardinal directions?”
    Mundo testified that a design engineer wants to have all three cardinal directions protected on
    latches because “whatever you are latching, you want to keep it connected for all foreseeable
    crashes.” Mundo cited as an example a door latch, which is “connected in all three cardinal
    directions.”
    Mundo first examined Walters’ vehicle in November 2012, over six years after the
    accident. He came to the conclusion that “the connections failed” in the load three path, which
    “allowed the windshield to go do its own thing and the roof to go do its own thing.” Mundo used
    a roof latch removed from another 1995 Mazda Miata to demonstrate to the jury how the latch
    operated and how it could come apart in his hand. 8 By moving the latch parts in his hands,
    7
    Mundo defined “vibration” as “the vehicle twisting, bending up and down, and moving
    around as a matchbox.” Mundo testified that vibration “tends to do bad things for the occupants
    and do bad things for the structure of the vehicle.”
    8
    Mazda objected to the demonstration by Mundo stating that “the written record should
    reflect that the witness has one piece in his hand and the other piece in his hand.” Mazda pointed
    out that these parts of the latch “are normally attached to steel windshield headers . . . and to a
    steel structure that forms the front of the soft top, and it’s not in any way related.” Mazda argued
    that it was “an experiment that does not in any way duplicate or even come close to the
    conditions that exist in a real vehicle.” Mazda stated that because one side of the latch is
    screwed into the metal windshield header and the other side is screwed into the metal fore-
    structure of the roof, “[t]hey are screwed in by way of two screws which actually prevents them
    from being twisted in the way in which Mr. Mundo twisted them.” The circuit court overruled
    the objection explaining that the jury was able to “make the distinction that this is not the latch’s
    operation as it’s attached to the vehicle.” Mazda assigns error to the circuit court’s ruling
    allowing Mundo’s “demonstration of the alleged defect” through manipulation of the latch in his
    hands. Our holding renders it unnecessary for us to address this assignment of error.
    5
    Mundo testified he could “show that it’s not locked in the vertical direction.” Mundo explained
    that automotive design engineers use a design process called “failure mode and effects analysis”
    in which they “have to think about how can [a component part] fail” and “if it does fail, what’s
    the effect.” In performing this analysis, “an engineer sitting at a desk getting component parts is
    going to look at it with respect to how does it fail” and “he is going to work with it” and “check
    three cardinal directions.” Mundo stated that “if I could take it apart by hand, that is something
    that is troubling from a failure mode with respect to the real world vehicle.”
    According to Mundo, it has been “state of the art” in the automotive industry since 1972
    that “[i]f it’s going to be latched, it’s latched in three cardinal directions.” Mundo compared the
    Mazda Miata roof latch to a Ford Mustang roof latch in which there is a “big, long, solid steel
    bar, and it’s not chamfered. 9 It’s a steel bar that goes into a hole. And when it’s in there, it’s not
    coming out.” Mundo testified that “it is not reasonably prudent to not design into the latch
    mechanism all three cardinal directions with the top down just because it can be released and put
    back.” “[W]ith the top up,” stated Mundo, “we are trying to design a system that will get
    everybody to share in the way the loads are distributed throughout the vehicle.”
    Mundo testified that, in his opinion, the windshield header and soft top became
    disconnected in the crash because the latches came “undone.” He further testified that the
    latches came undone because “the up and down is dependent on that tiny little nub that was in
    there, and it wasn’t sufficient to hold it and it came apart.” In Mundo’s opinion, the latch was
    defectively designed because the pin and hole “are chamfered” so that “it’s easy for [the pin] to
    move and pop right out of [the hole].” According to Mundo, if “the connection had remained
    9
    A “chamfer” is defined as “the surface formed by cutting away the angle at the
    intersection of two faces of a piece of . . . metal: a beveled edge” or “a small groove” or “furrow”
    in such material. Webster’s Third New Int’l Dictionary 372 (1993). “Chamfered” describes a
    piece of material which has been so cut. 
    Id. 6 connected,
    then the front end of the roof structure would have performed just like the back end of
    the roof structure,” which did not collapse. In order to reach his opinion, Mundo stated it was
    unnecessary for him to do testing
    [b]ecause the issue at hand is that the joints were not connected, and there
    was no damage to the devices that were doing the connecting. And the
    crash spoke for itself. There it is. It’s not connected. And that’s really
    ofttimes the way engineers like to look at it. That’s a field crash test, if you
    will, a real world crash test out on the nation’s highways. And that test
    speaks for itself. It came apart.
    (Emphasis added.) Mundo also stated that based on a cost of 20 to 25 cents per pound of steel
    for components, it would have cost Mazda 10 cents per latch to manufacture a latch that would
    follow the “right-hand rule.” 10
    Mundo testified that he did not apply any safety standards other than the “right-hand
    rule.” Mundo confirmed that he did not rely on any automotive engineering papers, literature or
    written standards to support his opinion. He stated he did not perform a vibration analysis of the
    vehicle and did not attempt to calculate any of the vibrations that the vehicle underwent during
    the crash. Mundo also stated that he did not conduct any studies to determine under what
    circumstances vibration will cause the roof latches to part. He testified that he performed no
    testing of a Mazda Miata soft top or latch or testing of any kind in connection with this case
    except for his courtroom “demonstration that [the latch] comes apart . . . by disengaging the
    latching mechanism.”
    Mundo acknowledged that he performed no testing or analysis of the Ford latching
    system that he compared to the latch on the Mazda Miata. He testified that he does not know
    10
    Mazda argues that the circuit court erred in overruling Mazda’s objections to Mundo’s
    testimony regarding the cost of an alternative design because the testimony “was speculative and
    lacked a sufficient foundation.” Our holding renders it unnecessary for us to address the
    assignment of error pertaining to this argument.
    7
    how much weight the Ford latching system will support if the latches are connected. He also
    testified that he doesn’t know how much weight the Mazda latching system will support when
    the latches are connected. Furthermore, he declined to say that the Ford Mustang latching
    system was a reasonably safe alternative, as indicated during the following colloquy:
    Q Have you performed any tests of the Ford system?
    A No.
    Q Have you perform[ed] any analysis of the Ford system?
    A No.
    Q Do you know how much weight the Ford system will support if the
    latches are connected?
    A I don’t know the answer to that. I didn’t – I wasn’t asked to calculate the
    weights and the forces for the –
    Q Don’t know. Do you know how much weight the Mazda system will
    support when the latches are connected?
    A If we are just talking static and putting a weight on the roof?
    Q Have you done that calculation?
    A No.
    Q All right, thank you. Do you know how much – have you done any
    calculations to determine the weight bearing capacity of any aspect of the
    Mazda or the Ford?
    A No.
    Q How would you show that a system is reasonably safe? Wouldn’t you
    have to run tests?
    A Tests and/or – you mean physical tests? There is also computer analyses
    that can be done.
    Q And you haven’t done any tests or computer analyses of the Ford system,
    have you.
    8
    A No, I have not.
    Q So you are not here to try to suggest to the jury that that system is
    reasonably safe, are you?
    A That’s correct.
    Q Thank you.
    A I am telling you that it has design features, not that it’s the go-to design.
    It’s just the features to point out the difference between the locking pins.
    Q And how strong the pins and the latches are in the Ford system is not
    something you have undertaken to analyze, true?
    A True. I wasn’t asked to do that.
    Mundo admitted that a roof system that remains connected, and even a roof system that has no
    latches, can be crushed. He agreed he had seen that many times with a variety of vehicles
    involved in rollover incidents.
    Mazda moved to strike Mundo’s testimony at trial, contending that “the upshot of Mr.
    Mundo’s testimony is simply this: That . . . he thinks the latches came undone, and latches ought
    not come undone in foreseeable rollover crashes.” During argument, the circuit court questioned
    Walters’ counsel regarding the basis for Mundo’s opinion that the latch design was defective:
    Q What is his testimony – the defect that he has established?
    A The defect that he has established is that the knob that connected –
    Q Knob that goes into the hole in the latch was, quote, too short. In
    comparison to what?
    A In comparison to what is acceptable in the –
    Q To the Ford latch, right?
    A That’s more an example.
    Q But he compared it to the Ford latch, and he doesn’t even know if the
    Ford latch will hold, according to his own testimony.
    9
    A No. What he said was that that was an example, an illustrative example
    of how – and I think he was pretty clear on this. They said, “Is this it?” He
    said, “No, I am using this as an example to show the design feature, not the
    design.”
    Q So what is the standard of the industry for the length of the insertion –
    A The standard in the industry –
    Q – as testified to?
    A – for the length of insertion is sufficient so that when it is put in an
    ordinary – if it’s put in the situation that it will stop the latch from coming
    apart in all three cardinal directions, and this will –
    Q Under all circumstances.
    A Of the latch, yeah. You know, without breaking. I mean, the – he said
    there is no breaking of this thing. In other words, we don’t have any broken
    parts with the latch.
    Q No, it was structurally sound as far as what the evidence is.
    A Structurally sound. So I think the standard of the industry is that in the
    absence of – of being such a huge bad crash that would, you know, cause a
    structural problem, it just should not just come apart.
    Walters called an osteopathic physician specializing in sports medicine, Dr. Per Gunnar
    Brolinson, to provide an expert opinion regarding the cause of her injury. Over Mazda’s
    objection, Brolinson, was qualified as a medical expert “to provide medical and
    biomedical/biomechanical causation opinion testimony.” Brolinson expressed an opinion that
    during the rollover crash, the windshield header “came down, after pressure, on the top of
    [Walters’] head.” According to Brolinson, Walters then “went into extreme flexion” resulting in
    a “fracture-dislocation, tearing of the soft tissue, and movement of the cervical spine, C6 on C7,
    which put pressure on the spinal cord.” As indicated by the following colloquy, Brolinson could
    not say at what point during the crash (whether before or after the latch disengagement) the
    10
    injury occurred or how much intrusion into the occupant compartment needed to be avoided to
    prevent the injury:
    Q It’s true, isn’t it, that you don’t know how much space was between Ms.
    Walters’ buttocks and her seat when the injury occurred?
    A That’s correct.
    Q And you don’t know how many degrees of roll when the injury
    occurred?
    A That’s correct.
    Q And by that, I am talking about degrees of roll of the vehicle, correct?
    A That’s correct.
    Q And it’s true that you don’t know how much movement of Ms. Walters’
    head was necessary to cause her injury even under your hyperflexion
    theory, correct?
    A That’s correct.
    Q You can’t quantify the amount of flexion that Ms. Walters sustained,
    even if we were to accept your theory, true?
    A That’s correct.
    Q And it’s true, isn’t it, that you don’t know how much head room
    compromise would need to have been avoided in order to prevent this
    injury, assuming we accept even your theory?
    A That’s correct. 11
    11
    The circuit court overruled Mazda’s objection to Brolinson’s qualification to provide
    an opinion on the cause of Walters’ injury and denied Mazda’s motion to strike Brolinson’s
    testimony. On appeal, Mazda argues that Brolinson lacked the requisite expertise to render an
    opinion regarding the cause of Walters’ injury because he has no “knowledge, training, skill, or
    experience identifying the mechanism of [neck fractures] generally” or injuries sustained “in a
    violent rollover car crash.” Mazda also contends that Brolinson lacked any foundation for his
    opinion because there was no physical evidence of contact between Walters’ head and the
    windshield header or any support in medical literature for his opinion that extreme neck flexion
    could cause the type of injury Walters sustained. Our holding renders it unnecessary for us to
    address the assignments of error pertaining to the admission of Brolinson’s testimony.
    11
    II. ANALYSIS
    A.      Duty to Provide Occupant Rollover Protection
    Mazda argues that it owed no legal duty to design the soft top or the latches to provide
    occupant rollover protection because it is not the intended or foreseeable purpose of a convertible
    soft top, including the latching system, to provide such protection. Mazda points out that there
    was no evidence that Mazda or any car manufacturer designs soft tops or latches to provide
    occupant rollover protection, that consumers expect a soft top to provide occupant rollover
    protection, or that there exists any industry standard or custom to design soft tops or their latches
    to provide such protection. 12
    Walters contends that Mazda sold a dual-purpose product. According to Walters, when
    the top was in use, it was a foreseeable purpose of the top and latching mechanism to provide the
    same occupant rollover protection as a sedan with a permanent roof structure. Walters
    specifically asserts that it was “a fundamental and intended purpose” of the latches to “keep any
    part of the structure from intruding into the occupant compartment and creating a hazardous
    environment.” Thus, she argues, “the latches failed their intended safety purpose of keeping the
    structures connected and thus away from the occupant.”
    The issue of whether a manufacturer of a soft top convertible owes a legally recognized
    duty to design or supply a soft top or its latching system to provide occupant rollover protection
    is a threshold question that we determine as a matter of law. See Jeld-Wen, Inc. v. Gamble, 
    256 Va. 144
    , 147, 
    501 S.E.2d 393
    , 396 (1998) (stating that the dispositive issue on appeal, which
    involves a determination as a matter of law, is whether a manufacturer of an ordinary window
    12
    Mazda argued that it owed no duty to design its soft top or latches to provide rollover
    occupant protection in its motion to strike made at the conclusion of Walters’ evidence, its
    motion to strike renewed at the conclusion of all evidence, and its motion to set aside the verdict.
    12
    screen owes a duty to manufacture the screen to act as a body restraint); see also 1 Dan B.
    Dobbs, Paul T. Hayden & Ellen M. Bublick, The Law of Torts § 164, at 526 (2d ed. 2011)
    (“Judges rather than juries determine whether the defendant was under a duty of care at all and if
    so what standard of care applied. That is to say that the standard of care and existence of a duty
    to use care are matters of law and are determined by legal rules.”).
    Walters does not claim that a defect in the Miata caused the rollover crash; rather,
    Walters seeks to hold Mazda liable for failing to design the soft top latching system to provide
    occupant protection during the rollover crash. In Virginia, there is no duty on the part of vehicle
    manufacturers to design or supply a crashworthy vehicle. See Slone v. General Motors Corp.,
    
    249 Va. 520
    , 525-26, 
    457 S.E.2d 51
    , 53-54 (1995) (expressly rejecting the “crashworthiness”
    doctrine). 13 Therefore, if a duty to design convertible soft tops to provide occupant rollover
    protection exists, it must be found within the scope of a vehicle manufacturer’s duty to exercise
    reasonable care to design a product that is reasonably safe for the purpose for which it is
    intended. See 
    id. (stating that
    instead of injecting the doctrine of “crashworthiness” into our
    well-settled jurisprudence, we will apply the product liability principles articulated in our
    precedent).
    Our well-settled jurisprudence establishes that the manufacturer of a product is only
    under a duty “to exercise ordinary care to design a product that is reasonably safe for the purpose
    for which it is intended.” Turner v. Manning, Maxwell & Moore, Inc., 
    216 Va. 245
    , 251, 217
    13
    We have previously defined a crashworthy vehicle as “one which, in the event of a
    collision, resulting accidentally or negligently from the act of another and not from any defect or
    malfunction in the vehicle itself, protects against unreasonable risk of injury to the occupants.”
    
    Slone, 249 Va. at 525
    n.*, 457 S.E.2d at 53 
    n.* (internal quotation marks and citation omitted).
    The “crashworthiness” doctrine “concerns the dangers posed by the vehicle occupants’ collision
    with the interior of the vehicle upon collision, or the intrusion of moving or standing objects,
    upon collision, into the passenger area.” 
    Id. (internal quotation
    marks and citation omitted).
    
    13 S.E.2d 863
    , 868 (1975). Similarly, “an implied warranty of general merchantability [arises]
    when the product is being used in the manner intended for it. The implied warranty does not
    apply when the product is being used in a manner or for a purpose for which it was not
    intended.” 
    Id. at 252,
    217 S.E.2d at 869; see also Dorman v. State Indus., Inc., 
    292 Va. 111
    , 123,
    
    787 S.E.2d 132
    , 139 (2016). Thus, “the standard of safety of goods imposed on . . . the
    manufacturer of a product is essentially the same whether the theory of liability is labeled
    warranty or negligence. The product must be fit for the ordinary purposes for which it is to be
    used.” Logan v. Montgomery Ward & Co., 
    216 Va. 425
    , 428, 
    219 S.E.2d 685
    , 687 (1975).
    The determination of whether a vehicle manufacturer owes a duty to design a convertible
    soft top to provide occupant rollover protection, therefore, requires that we consider whether
    such protection is the intended or reasonably foreseeable use given the inherent characteristics,
    market purposes, and utility of a convertible soft top. “After all, it is a commonplace that utility
    of design and attractiveness of the style of the car are elements which car manufacturers seek
    after and by which buyers are influenced in their selections.” Dreisonstok v. Volkswagenwerk,
    A.G., 
    489 F.2d 1066
    , 1072 (4th Cir. 1974). “Foreseeability [of harm], it has been many times
    repeated, is not to be equated with duty.” 
    Id. at 1070.
    Accordingly, while the possibility that a
    convertible may be involved in a rollover accident is undoubtedly foreseeable, “[c]ommon
    knowledge of a danger from the foreseeable misuse of a product does not alone give rise to a
    duty to safeguard against the danger of that misuse.” Jeld-Wen, 
    Inc., 256 Va. at 149
    , 501 S.E.2d
    at 397. “To the contrary, the purpose of making the finding of a legal duty as a prerequisite to a
    finding of negligence, or breach of implied warranty, in products liability is to avoid the
    14
    extension of liability for every conceivably foreseeable accident, without regard to common
    sense or good policy.” 
    Id. (emphasis added)
    (internal quotation marks and citation omitted). 14
    In contrast to vehicles with a permanent roof structure, soft top convertibles provide the
    owner with a roof that can, with relative ease, be retracted and stowed for an open-air driving
    experience or closed to protect the occupants from the outside elements such as wind and rain.
    The absence of a permanent roof structure necessarily diminishes the level of occupant rollover
    protection. Not only is this characteristic of a convertible “readily discernible to any one using
    the vehicle,” it is “the unique feature of the vehicle.” 
    Dreisonstok, 489 F.2d at 1074
    (noting that
    the unique design of the Volkswagen microbus reduced the space between the front of the
    vehicle and driver’s compartment so as to provide the maximum amount of cargo or passenger
    space). “If a person purchases a convertible . . . he cannot expect – and the Court may not
    impose on the manufacturer the duty to provide him with – the exact kind of protection in a roll-
    over accident as in the standard American passenger car.” 
    Id. at 1075
    (internal quotation marks
    omitted) (comparing a microbus to a convertible and stating that “[t]he distance between the
    14
    Existence of duty is an issue that is separate and distinct from its breach. In order to
    establish a breach of duty in a product liability action, the plaintiff bears the burden of proving
    the product contained an unreasonably dangerous condition that existed when the product left the
    defendant’s hands. “A product is unreasonably dangerous if it is defective in assembly or
    manufacture, unreasonably dangerous in design, or unaccompanied by adequate warnings
    concerning its hazardous properties.” Morgen Indus., Inc. v. Vaughan, 
    252 Va. 60
    , 65, 
    471 S.E.2d 489
    , 492 (1996). To sustain a claim for negligent design, a plaintiff must show that the
    manufacturer failed to meet objective safety standards prevailing at the time the product was
    made. “When deciding whether a product’s design meets those standards, a court should
    consider whether the product fails to satisfy applicable industry standards, applicable
    government standards, or reasonable consumer expectations.” Redman v. John D. Brush & Co.,
    
    111 F.3d 1174
    , 1177-78 (4th Cir. 1997); see also Alevromagiros v. Hechinger Co., 
    993 F.2d 417
    ,
    420 (4th Cir. 1993) (“In determining what constitutes an unreasonably dangerous defect, a court
    will consider safety standards promulgated by the government or the relevant industry, as well as
    the reasonable expectations of consumers.”).
    15
    front and the passenger compartment is minified in order to provide additional cargo or
    passenger space just as the convertible is designed to provide openness”). 15
    In connection with examining the duty of a vehicle manufacturer to design a convertible
    soft top to provide rollover protection, we note that when the Mazda Miata was manufactured in
    1995, there were no government or automotive industry safety standards in existence requiring
    that convertible soft tops provide protection from intrusion of the roof system into the occupant
    compartment during a rollover crash. While the National Highway Transportation Safety
    Administration (“NHTSA”) established “strength requirements for the passenger compartment
    roof” of specified vehicles, it expressly excluded convertibles from such requirements. 16 See
    Federal Motor Vehicle Safety Standard (“FMVSS”) No. 216, 49 C.F.R. § 571.216(S3)(c). The
    stated purpose of FMVSS No. 216 “is to reduce deaths and injuries due to the crushing of the
    roof into the occupant compartment in rollover crashes.” 
    Id. at (S2).
    The roof over the front seat
    area specifically includes the windshield header. 17
    In 2009, the NHTSA upgraded its safety standard on roof crush resistance “[a]s part of a
    comprehensive plan for reducing the risk of rollover crashes and the risk of death and serious
    15
    In Dreisonstok, the Fourth Circuit Court of Appeals assumed Virginia would adopt the
    “crashworthiness” doctrine and, therefore, would impose upon vehicle manufacturers a general
    duty to design a reasonably “crashworthy” 
    vehicle. 489 F.2d at 1069-70
    . Nevertheless, in
    holding that the manufacturer of the microbus was entitled to judgment as a matter of law, the
    court aptly noted: “It is entirely impermissible to predicate a conclusion of negligent design
    simply because a vehicle, having a distinctive purpose, such as the microbus, does not conform
    to the design of another type of vehicle, such as a standard passenger car, having a different
    nature and utility.” 
    Id. at 1075
    .
    16
    Under FMVSS No. 201, a convertible is defined as “a vehicle whose A-pillars are not
    joined with the B-pillars (or rearmost pillars) by a fixed, rigid structural member.” 49 C.F.R. §
    571.201(S3). This definition was made applicable to FMVSS No. 216, see 74 Fed. Reg. 22,348,
    and is now incorporated into FMVSS No. 216a, see 49 C.F.R. § 571.216a(S4).
    17
    Under FMVSS No. 216, the roof over the front seat area includes the “windshield
    trim,” which is defined as the “molding of any material between the windshield glazing and the
    exterior roof surface, including material that covers part of either the windshield glazing or
    exterior roof surface.” 49 C.F.R. § 571.216(S4).
    16
    injury in those crashes.” 74 Fed. Reg. 22,348. The NHTSA continued to exclude convertibles,
    including retractable hard top convertibles, from the FMVSS No. 216 requirements. See id; see
    also 49 C.F.R. § 571.216a (providing the upgraded standard on roof crush resistance).
    Explaining its reason for excluding convertibles from the roof crush resistance standard, the
    NHTSA stated:
    We believe that to establish a roof crush requirement on vehicles that do not
    have a permanent roof structure would not be practical from a
    countermeasure perspective. A convertible roof would have to be strong
    enough to pass the quasi-static test, yet flexible enough to fold into the
    vehicle. Since we are not aware of any such designs, we do not agree with
    Advocates [who disagreed with excluding convertibles from FMVSS No.
    216] on this point. We also note that new rollover and ejection
    requirements for convertibles are outside the scope of this rulemaking.
    74 Fed. Reg. at 22,375. Even as to folding hardtops and removable hardtops, the NHTSA noted
    that “[t]hese roof systems are not intended as significant structural elements but are designed
    primarily to provide protection from inclement weather, improve theft protection and are
    generally offered as a luxury item.” 
    Id. Furthermore, the
    NHTSA expressed its belief that
    “consumers readily recognize that [these roof systems] will afford occupants limited protection
    in a rollover.” 
    Id. 18 Accordingly,
    there continues to be no government or automotive industry
    safety standards requiring convertible soft tops to provide occupant rollover protection.
    18
    Walters argues that consideration of FMVSS No. 216, and in particular the exclusion
    of convertibles from its roof crush requirements, is inappropriate because this case is about
    defective latches, not a defective roof. Walters’ argument is a non sequitur. It is the absence of a
    permanent roof structure that requires use of latches to connect the top to the windshield. And it
    is this inherent feature of a convertible – the absence of a fixed, rigid structural member to
    connect the A-pillars (which frame the vehicle’s windshield) to the B-pillars (which frame the
    vehicle’s rear window) – that makes roof crush requirements impractical for convertibles.
    Furthermore, Walters’ effort to make a distinction between the roof and the latches is unavailing
    since the basis of her claims for negligence and breach of implied warranty of merchantability is
    that the Miata “would not provide reasonable occupant protection in a foreseeable rollover while
    being used in its closed top configuration.” Occupant protection in a rollover crash is the precise
    issue addressed by FMVSS No. 216.
    17
    Although Walters attempted to establish a safety standard that would impose upon
    manufacturers of convertibles a duty to design soft tops to provide occupant rollover protection,
    her expert, Mundo, only testified as to a general engineering principle he referred to as a “right-
    hand rule” applicable to all automobile components, including latches. The “right-hand rule,”
    however, does not specify any standard for rollover protection for occupants of soft top
    convertibles that is recognized in the automotive industry. Mundo did not testify as to any
    industry standard or custom to design the soft tops or latches to provide occupant rollover
    protection. He also did not identify any force requirements for a convertible soft top roof system
    in general or any required level of crush resistance promulgated by the automotive industry. 19
    Certainly, Walters did not present evidence through Mundo or otherwise that any automobile
    manufacturer designs or markets a soft top convertible to provide occupant rollover protection.
    In essence, Walters’ assertion, unsupported by industry standards or custom, that the soft top
    should stay latched to the windshield header in all foreseeable rollovers seeks to impose upon
    manufacturers the duty to design a rollover-proof convertible when a soft top is in use. Yet, it is
    well-settled that “[t]he manufacturer is not an insurer and is not required to design and market an
    accident-proof product.” 
    Turner, 216 Va. at 251
    , 217 S.E.2d at 868; see also 
    Dorman, 292 Va. at 123
    , 787 S.E.2d at 139.
    In short, we believe that imposing a duty upon manufacturers of convertible soft tops to
    provide occupant rollover protection defies both “common sense” and “good policy.” Jeld-Wen,
    
    Inc., 256 Va. at 149
    , 501 S.E.2d at 397. There are no safety standards in existence, promulgated
    19
    The safety standard for roof crush resistance set forth in FMVSS No. 216 requires that
    when a large steel plate (or platen) is used to apply force to the leading edge of the roof in
    accordance with the stated procedures, the distance that the test plate has moved from the point
    of contact must not exceed 127 mm (5 inches). See 49 C.F.R. § 571.216(S5). As noted,
    convertibles are excepted from this standard and Mundo did not point to any alternative standard
    for convertibles that has been recognized in the automotive industry.
    18
    either by the government or the automotive industry, that require convertible soft tops, including
    their latching mechanisms, to provide occupant rollover protection. Indeed, the NHTSA has
    expressly excepted convertibles from the roof crush standard because it is unaware of any
    convertible top that could meet such a standard. There is certainly no evidence that Mazda or
    any other manufacturer of convertibles in fact designs or markets soft tops to provide occupant
    rollover protection or that consumers reasonably expect such protection. To the contrary, the
    marketable feature of the soft top convertible is the absence of a permanent roof structure. The
    absence of this structural component is not only obvious but chosen by consumers who desire the
    flexibility of a soft top that can be easily detached, folded, and stowed for an open-air driving
    experience or closed and latched to the windshield header for a quieter ride without exposure to
    the outside elements. The use of a convertible soft top, including its latches, for occupant
    rollover protection is neither its purpose nor an intended or reasonably foreseeable use.
    For these reasons, we hold that no duty extended to Mazda to design the soft top,
    including its latches, so that it would provide occupant rollover protection. See Jeld-Wen, 
    Inc., 256 Va. at 150
    , 501 S.E.2d at 397 (holding, as a matter of law, no duty extended to defendant to
    manufacture ordinary window screen to act as childproof restraint). Therefore, we will reverse
    the judgment of the circuit court and enter final judgment in favor of Mazda.
    B. Admission of Mundo’s Opinion
    Even if Mazda owed a duty to design the soft top to provide occupant rollover protection,
    which we hold it did not, we also conclude that Mundo’s opinion that the soft top’s latching
    system was defectively designed was inadmissible.
    “Expert opinion may be admitted to assist the fact finder if such opinion satisfies certain
    requirements, ‘including the requirement of an adequate factual foundation.’” Hyundai Motor
    19
    Co. v. Duncan, 
    289 Va. 147
    , 154, 
    766 S.E.2d 893
    , 897 (2015) (quoting Forbes v. Rapp, 
    269 Va. 374
    , 381, 
    611 S.E.2d 592
    , 596 (2005)); see Code §§ 8.01-401.1 and -401.3; Va. R. Evid. 2:702
    and 2:703; Countryside Corp. v. Taylor, 
    263 Va. 549
    , 553, 
    561 S.E.2d 680
    , 682 (2002). We
    review the circuit court’s decision to admit expert opinion using an abuse of discretion standard
    and, therefore, will reverse the circuit court’s decision “only upon a finding of abuse of that
    discretion.” Hyundai Motor 
    Co., 289 Va. at 155
    , 766 S.E.2d at 897. A circuit court, though,
    “has no discretion to admit clearly inadmissible evidence.” 
    Id. (quoting Harman
    v. Honeywell
    Int'l, Inc., 
    288 Va. 84
    , 92, 
    758 S.E.2d 515
    , 520 (2014)).
    Expert opinion that is founded upon assumptions having no basis in fact is inadmissible.
    See Hyundai Motor 
    Co., 289 Va. at 155
    , 766 S.E.2d at 897; CNH America LLC v. Smith, 
    281 Va. 60
    , 67, 
    704 S.E.2d 372
    , 375 (2011); Vasquez v. Mabini, 
    269 Va. 155
    , 159-60, 
    606 S.E.2d 809
    ,
    811 (2005). Therefore, the “[f]ailure of the trial court to strike such testimony upon a motion
    timely made is error subject to reversal on appeal.” CNH 
    America, 281 Va. at 67
    , 704 S.E.2d at
    375.
    Mundo’s opinion that the Mazda Miata soft top latching mechanism was defective in
    design was premised on at least two unfounded assumptions. First, his opinion was based on an
    assumption that the latches would not have disconnected if they had been designed differently. 20
    There was no evidentiary foundation for any such assumption. Although Mundo testified that
    the latches came “undone” because they were not sufficiently designed to hold in vertical
    movement, he was not able to say under what circumstances vibration would cause the latches to
    20
    Mundo did not articulate what this alternative design would be. As noted previously,
    Mundo did not specify any particular standard or design to which soft top latches should
    conform. He discussed the Ford Mustang latch “to point out the difference between the locking
    pins” but testified he did not consider the Ford latching system as “the go-to design.” Rather,
    Mundo’s opinion was that automobile latches in general should be designed according to the
    “right-hand rule” and should stay connected for all foreseeable crashes.
    20
    part, and indeed, did not even calculate the vibrations the vehicle underwent during the crash or
    the forces and weight to which the vehicle was subjected. While Mundo described a “failure
    mode and effects analysis” in which an engineer will examine component parts to consider how
    they might fail, he performed no testing or analysis of the Mazda latching system. 21
    Furthermore, though Mundo compared the design of the Mazda latching system to that of the
    Ford Mustang, he performed no testing or analysis of the Ford latching system and could not say
    that the Ford latches would have remained connected in this crash. His declaration that “the
    crash spoke for itself” did not supply the necessary foundation for his opinion. In sum, Mundo’s
    assumption that the latches would not have disengaged had they been designed according to the
    “right-hand rule” was pure speculation.
    Mundo’s opinion that the latching mechanism was defective was also premised on his
    unfounded assumption that the front end of the roof structure would not have collapsed if the
    latches had remained connected. 22 Mundo testified that he did not know how much weight the
    Mazda latching system (to create the continuous third load path he described) would support
    when the latches were connected. He confirmed that he had done no calculations to determine
    the weight bearing capacity of any aspect of the Mazda Miata. Mundo agreed that while one
    would need to run physical tests or computer analyses to makes such determinations, he had not
    done so. Mundo conceded that the collapse of the roof system could occur in rollover crashes
    even when a convertible’s latches stay connected. In fact, Mundo testified that permanent roof
    structure systems (those without latches) could be, and have been, crushed in rollover accidents.
    21
    The demonstration Mundo conducted with a Mazda latch removed from another 1995
    Mazda Miata did not purport to show how any other design could have withstood the crash but
    merely displayed to the jury his ability to take apart the latch by manipulating it in his hand.
    22
    According to Mundo, if “the connection had remained connected, then the front end of
    the roof structure would have performed just like the back end of the roof structure,” which did
    not collapse.
    21
    There was simply no basis for his assumption that the front end of the roof structure would not
    have collapsed during the rollover crash if the latches had remained connected.
    Because Mundo’s opinion that the Mazda Miata latching system was defectively
    designed lacked an adequate foundation, the circuit court abused its discretion in admitting it.
    Mundo’s opinion supplied the only support for Walters’ claim that the vehicle was unreasonably
    dangerous. Thus, the inadmissibility of Mundo’s opinion was fatal to Walters’ claims for
    negligence and breach of implied warranty of merchantability and provides a separate and
    independent basis for entering judgment as a matter of law for Mazda. See Hyundai Motor 
    Co., 289 Va. at 157
    , 766 S.E.2d at 898 (“Because [an expert’s] opinion supplied the only support for
    the [plaintiffs’] claim that the vehicle was unreasonably dangerous, the inadmissibility of [his]
    opinion as a matter of law is fatal to the [plaintiffs’] claim and entitles [defendant] to judgment
    as a matter of law.”). 23
    III. CONCLUSION
    For the foregoing reasons, we will reverse the judgment of the circuit court and enter
    final judgment for Mazda.
    Reversed and final judgment.
    23
    Mazda also contends that, aside from the issues of duty and admissibility of the expert
    testimony, Walters failed to present evidence of an unreasonably dangerous condition or that any
    such condition proximately caused Walters’ injury. As we have stated, a plaintiff must show that
    the manufacturer failed to meet objective safety standards prevailing at the time the product was
    made to sustain a claim for negligent design. In addition, a plaintiff must prove that the
    unreasonably dangerous condition actually caused the injury. “The proximate cause of an event
    is that act or omission which, in natural and continuous sequence, unbroken by an efficient
    intervening cause, produces that event, and without which that event would not have occurred.”
    Wells v. Whitaker, 
    207 Va. 616
    , 622, 
    151 S.E.2d 422
    , 428 (1966). Notably, neither of Walters’
    experts in this case could say at what point during the rollover crash the latches disconnected or
    whether the latches disconnected before Walters was injured. And there was no evidence that
    Walters’ injury would not have occurred even if the latches had remained connected. Our
    holding, however, renders it unnecessary for us to address Mazda’s arguments pertaining to
    proof of an unreasonably dangerous condition and causation of Walters’ injury.
    22