In many personal injury cases, procedural rules may require the plaintiff to produce specific types of evidence to prove his or her legal claim. In an opinion released on April 17, 2017, the Court of Special Appeals of Maryland considered whether the plaintiffs could proceed with their negligence claims against an amusement park on the theory of res ipsa loquitur. The plaintiffs were injured on a river ride during a visit to the defendant’s amusement park in 2011. The incident occurred after a raft on the ride became stuck for an unknown reason and collided with the raft occupied by the plaintiffs. The matter was brought on appeal after the circuit court granted summary judgment in favor of the defendant.
Res ipsa loquitur allows a plaintiff to present a prima facie case when direct evidence of the cause of an accident is not available or is available solely to the defendant, and circumstantial evidence permits the jury to infer that the defendant’s negligence was the cause. Under the doctrine of res ipsa loquitur, the factfinder may draw an inference of negligence if the plaintiff proves three elements: (1) the plaintiff suffered an injury that does not ordinarily occur absent negligence; (2) the injury was caused by an instrumentality exclusively in the defendant’s control; and (3) the injury was not caused by any act or omission by the plaintiff. Typically, the common knowledge of jurors is sufficient to support an inference or finding of negligence on the part of a defendant. However, in some cases, expert testimony is required to establish negligence and causation.