Whether Murphy produced sufficient evidence that the Flopper malfunctioned through a sudden, negligent jerk.
Holding
No. Murphy’s description of a “sudden jerk” was insufficient to establish that the belt was defectively or negligently operated.
Reasoning
The belt was already moving when Murphy stepped onto it. In the confusion of immediately falling, his characterization of the event as a “jerk” did not reliably distinguish a mechanical irregularity that caused the fall from the ordinary force experienced as a result of the fall itself.
The defendant offered evidence that the belt transmitted power smoothly and could not operate otherwise under normal conditions. If the belt had moved spasmodically, that would have been an extraordinary and unexplained departure from normal operation, requiring stronger proof than Murphy’s brief description of his sensations during a sudden accident.
Even if a jerk had been proved, it would add little because the principal danger of the attraction was falling. The case could not properly rest on an inference that every fall from an amusement device designed to make patrons tumble resulted from negligent operation.