Res ipsa loquitur is an evidentiary doctrine that, under appropriate circumstances, may be invoked to allow the factfinder to infer negligence from the mere happening of an event. The doctrine follows from the understanding that some events ordinarily do not occur in the absence of negligence. A plaintiff must establish that the injury was caused by an agent or instrumentality within the defendant's exclusive control, and that no act or negligence on the plaintiff's part contributed to the happening of the event.
Berlich v. Maimonides Med. Ctr., NY Slip Op 05148 (2d Dep't September 14, 2022)
