This is an action to recover damages for harm sustained by the plaintiff when a lawn mower manufactured by the defendant injured the plaintiff’s foot. Trial by jury on tort counts sounding in negligence and strict liability before Flynn, J., resulted in verdicts for the defendant. The plaintiff’s exceptions concerning his strict liability claim were reserved and transferred. We affirm.
The plaintiff bought a “Craftsman” rotary power mower from the Sears, Roebuck & Company outlet in 1968. He had used similar mowers for over fifteen years and was thoroughly familiar with them. The rear of the housing of plaintiff’s mower is embossed with the'' warning, “Keep Hands & Feet From Under Mower.” The instruction booklet twice advises the operator to mow slopes lengthwise, not up and down. Although this advice is not highlighted, the type throughout the booklet is easily readable.
Despite this advice, the plaintiff thought that a long steep slope on his property could be mowed more safely if it were mowed up and down. While mowing in this manner, he lost his balance and fell. He instinctively gripped the handle of the mower as he fell and when he came to rest at the bottom of the slope, his foot was under the housing. Although there was conflicting testimony at the trial, the plaintiff contended that his foot slipped under the housing because the mower lacked a rear trailing guard. The defendant contended that the plaintiff lifted the mower from the ground when he fell, thus bringing the blade down on his foot. The defendant therefore *806 argued that the lack of a guard did not contribute to the accident. Alternatively, the defendant contended that the plaintiff was “contributorily negligent” in mowing up and down contrary to the explicit written instructions.
Before the adoption of the doctrine of strict liability, the injured consumer’s recourse at law was
“to
bring an action based either on the negligence of the manufacturer or, additionally or alternatively, on breach of warranty.” Cassidy,
Strict Liability in New Hampshire,
18 N.H.B.J. 3, 4 (1976). Consumers may now maintain actions based upon strict liability.
Buttrick v. Lessard,
We disagree with this approach
to the
doctrine of strict liability. Unlike workmen’s compensation and no-fault automobile insurance, strict liability is not a no-fault system of compensation. The common-law principle that fault and responsibility are elements of our legal system applicable to corporations and individuals alike will not be undermined or abolished by “spreading” of risk and cost in this State. Viewed as a system of spreading the risk, the doctrine of strict liability has had economic consequences. In the fifteen years since
Greenman v. Yuba Power Products, Inc.,
The “Fortune 500” companies suffer less economically because they can develop adequate statistics, purchase insurance, and employ expensive experts and legal counsel. For thousands of small manufacturers, the high cost of self-protection or insurance can be prohibitive so as to force them out of business.
See
Baldwin,
The Product Liability Crisis: Threat to Our Economy, Our Industry,
Woodworking & Furniture Digest (March, 1977). The resultant
*807
economic concentration lessens the consumer’s choices in the marketplace. While we reaffirm
Buttrick v. Lessard,
The present case concerns the elements of and defenses to a strict liability action alleging defective
design.
We are not here involved with an action alleging a
manufacturing
defect, where the defect is an accidental variation caused by a mistake in the manufacturing process; that is, where the product does not “conform to the great majority of products manufactured in accordance with that design.” Henderson,
Judicial Review of Manufacturer’s Conscious Design Choices: The Limits of Adjudication,
73 Colum. L. Rev. 1531, 1543.
See also Corbin v. Camden Coca-Cola Bottling Co.,
In a strict liability case alleging defective design, the plaintiff must first prove the existence of a “defective condition unreasonably dangerous to the user.’’
Buttrick v. Lessard,
*808
Another factor to be considered is the presence or absence of a warning. Of course, some products, such as carving knives, are obviously and inherently dangerous. When a risk is not apparent, however, the user must be adequately and understandably warned of concealed dangers. We do not agree, however, with such cases as
Davis,
The duty to warn is concomitant with the general duty of the manufacturer, which “is limited to foreseeing the probable results of the normal use of the product or a use that can reasonably be anticipated.”
McLaughlin v. Sears, Roebuck & Co.,
The plaintiff in a defective design case must also prove causation and foreseeability. He must show that the unreasonably dangerous condition existed when the product was purchased,
McLaughlin v. Sears, Roebuck & Co.,
Inquiry into the dangerousness of a product requires a multifaceted balancing process involving evaluation of many conflicting factors. A court will rarely be able to say as a matter of law that a product has no social utility, or that the purpose or manner of its use that caused the injury was not foreseeable.
See Phillips v. Ogle Aluminum Furniture Inc.,
The Restatement (Second) of Torts § 402A, Comment n (1965) states in part that:
[t]he form of contributory negligence which consists in voluntarily and unreasonably proceeding to encounter a known danger, and commonly passes under the name of assumption of the risk, is a defense under this Section as in other cases of strict liability. If the user or consumer discovers the defect and is aware of the danger, and *810 nevertheless proceeds to make use of the product and is injured by it, he is barred from recovery. (Emphasis added.)
In
Buttrick v. Lessard,
After the Buttrick, Stephan and McLaughlin causes of action had arisen, the legislature passed a comparative negligence statute effective August 12, 1969. That statute requires a comparison of defendant’s negligence with plaintiff’s contributory negligence. Thus contributory negligence is no longer an absolute bar to a negligence action; a comparing process is now used by the jury. A plaintiff can recover if the juiy does not find that his negligence was greater “than the causal negligence of the defendant.” RSA 507:7-a (Supp. 1977) repealing RSA 507:8.
Although this statute had no effect on the causes of action before the court in
Buttrick, Stephan,
and
McLaughlin,
comparative negligence has since been assumed to be applicable in strict liability cases in New Hampshire by federal courts.
Stevens v. Kanematsu-Gosho Co. Inc.,
We viewed the Restatement distinction between assumption of the risk and contributory negligence as merely “semantics” in Buttrick v. Lessard supra. These semantical distinctions, however, become *811 extremely important when a trial judge attempts to convey concepts to a jury in his charge. The language and connotations of legal terms such as “negligence,” when transferred from other types of cases, may lead to jury confusion in strict liability cases.
Other courts have recognized that when fault or negligence concepts are injected into a strict liability case using comparative negligence, semantic and conceptual problems become crucial. In a reversal of some of its earlier “pure” products liability stances, the California Supreme Court attempted to delineate those factors the jury must compare in a strict liability case. In
Daly v. General Motors
Corp.,
Because plaintiff’s case rests upon strict products liability based on improper design of the door latch and because defendants assert a failure in decedent’s conduct, namely, his alleged intoxication and nonuse of safety equipment, without which the accident and ensuing death could not have occurred, there is thereby posed the overriding issue in the case, should comparative principles apply in strict products liability actions?
Id.
at 731-32,
The court answered in the affirmative and we agree. The California court pointed out that there are semantical and theoretical differences between the “apples” of negligence and the “oranges” of strict liability that should not be mixed.
Id.
at 734,
To the extent the California court included negligence concepts in its comparison, we disagree. Semantic and conceptual clarity is essential if the jury is to understand a defective design case, especially if counts in negligence and strict liability are going to the jury. While we note that both counts are permitted, we do not *812 recommend to plaintiffs that counts in both negligence and strict liability against the same defendant be submitted to the jury because of the confusion which is created. Where both counts are submitted to the jury, the charge on the negligence count at the present time is:
Plaintiffs Claim: Defense:
Negligence Contributory Negligence
Governing Statute:
Comparative Negligence
And on the strict liability count, the jury charge includes:
Plaintiffs Claim: Defense:
Strict Liability Contributory Negligence
Governing Statute:
Comparative Negligence
The negligence concept in such instructions to a jury of laymen necessarily pervades the entire charge, thus submerging or obliterating the doctrinal impact of strict liability in a welter of verbiage. The jury should not be expected to grasp the extremely fine distinctions the trial court attempts to provide in its explanation that “comparative negligence” in a strict liability case does not really require a comparison of the parties’ “negligence.” If the trial courts use the term “plaintiff’s misconduct” to replace the words “contributory negligence” in the jury charge, this will separate the theories of strict liability and negligence more effectively in the minds of twelve laymen. “Plaintiff’s misconduct” will include, where applicable, product misuse or abnormal use, as well as embodying the “negligence” or “assumption of the risk” concepts in our prior cases of voluntarily and unreasonably proceeding to encounter a known danger. The words “plaintiff’s misconduct” accurately describe what action by the plaintiff, combined with the interaction of a defendant’s product, caused an accident or injury.
In Buttrick v. Lessard,
We judicially recognize the comparative concept in strict liability cases parallel to the legislature’s recognition of it in the area of negligence. Accordingly, we hold that the trial court should not read RSA 507:7-a (Supp. 1977) in a jury charge on the strict liability count, but rather should instruct the jury that it is to compare the causal effect of the defect in the product or design with the affirmative defense of misconduct of the plaintiff and allocate the loss as hereinafter indicated. The trial court should read or paraphrase Restatement (Second) of Torts § 402A(1) and (2) to the jury; the jury should then usually be asked by special verdict if plaintiff’s proof has met the requirements of the Restatement. If plaintiff’s proof is sufficient, the jury must weigh the plaintiff’s misconduct, if any, and reduce the amount of damages by the percentage that the plaintiff’s misconduct contributed to cause his loss or injury so long as it is not greater than fifty percent. If the jury concludes that the “misconduct of the plaintiff” was the sole cause or greater than one-half the cause of the loss or injury, the verdict must be for the defendant. Of course, if plaintiff’s misconduct did not cause the loss or injury, there would be no reduction in damages if the defendant is found liable. In multiple defendant cases, if recovery is allowed against more than one defendant, the jury shall apportion the loss in the ratio to which each liable defendant caused or contributed to the loss or injury to the amount of causation or liability attributed to all defendants against whom recovery is allowed.
See Mihoy v. Proulx,
To the extent prior cases are inconsistent with the procedure and terminology for the statement of strict liability defenses, they are
*814
overruled. Because comparative negligence has applied in these cases since
Hagenbuch v. Snap-On Tools Corp.,
In the present case the jury returned a verdict for the defendant and the trial judge entered judgment. There is evidence to support the verdict.
See Kierstead v. Betley Chevrolet-Buick, Inc.,
The plaintiff also excepted to the admission of the custom and usage standards of the lawn mower industry. The evidence was relevant and correctly admitted. The trial court charged the jury that the standards were evidence, but not binding on them, and that compliance with the standards would not absolve the manufacturer from liability if those standards did not comport with the jury’s notion of proper design. The admission of such evidence under the circumstances was not error.
See Lemery v. O’Shea Dennis, Inc.,
Exceptions overruled.
