Cohen v. Petty
F.2d 820 (1933)
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Rule of Law:
A driver is not chargeable with negligence if they are suddenly stricken by an illness, which they had no reason to anticipate, that renders it impossible for them to control their vehicle.
Facts:
- Jeanette Cohen was riding as a guest in an automobile driven by the defendant, her real estate agent.
- The defendant's wife and Cohen's sister were also passengers in the car during a social drive.
- While driving on the Colesville Pike, the defendant exclaimed to his wife, 'I feel sick.'
- A moment later, the defendant fainted, having never fainted before and having no reason to anticipate such an illness.
- Upon fainting, the defendant lost control of the automobile, which swerved off the road and crashed into an embankment.
- As a result of the crash, Jeanette Cohen sustained permanent injuries.
Procedural Posture:
- Jeanette Cohen (plaintiff) filed a lawsuit against the defendant-driver in the trial court.
- At trial, after the presentation of evidence, the trial judge gave binding instructions to the jury in favor of the defendant, effectively ending the case.
- The plaintiff, Jeanette Cohen, appealed the trial court's decision to the appellate court.
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Issue:
Is a driver who causes an accident negligent if the accident was caused by the driver's sudden and unforeseen loss of consciousness?
Opinions:
Majority - Groner, Associate Justice
No, a driver is not negligent when an accident is caused by a sudden, unforeseeable medical incapacitation. Negligence requires a breach of the duty to exercise reasonable care, and a driver who is suddenly overcome by an illness they had no reason to expect cannot be said to have breached that duty. The defendant's fainting spell was an unforeseen event that made it impossible for him to control the car. The positive, uncontradicted evidence showed that the defendant had no history of fainting and felt fine until the moment before the incident. Therefore, his loss of control was not due to any actionable negligence.
Analysis:
This case solidifies the 'sudden medical emergency' doctrine as a complete defense to negligence. It establishes that the element of breach of duty is not met when an actor's failure to control a vehicle is caused by a sudden, unforeseeable physical incapacitation. The decision places the burden on the plaintiff to demonstrate that the defendant had some forewarning or reason to anticipate the medical event, making recovery in such cases difficult. This principle is widely applied in tort law to absolve defendants of liability for accidents resulting from unexpected events like heart attacks, seizures, or fainting spells.

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