Longer Definition - that acting first and producing the injury, either immediately or by setting other events in motion, all constituting a natural and continuous chain of events, each having a close causal connection with its immediate predecessor, the final event in the chain immediately effecting the injury as a natural and probable result of the cause which first acted, under such circumstances that the person responsible for the first event should, as an ordinarily prudent and intelligent person, have reasonable ground to expect at the moment of his act or default that an injury to some person might probably result therefrom(Bataclan)
Expands concept - proximate cause - must either produce the injury immediately or set the events in motion. Imposes the requisite that the person responsible for the first event must have reasonable ground to expect at the moment of the act or omission that injury to some person might probably result.
As defined by Casis - is a cause without which the injury would not have occurred; and results in the injury as a foreseeable and natural and probable consequence
Proximate cause was necessary for the injury to occur and the type of injury must be one that could be foreseen, given the existence of the cause.
Chain of Events - if proximate cause does not immediately result in the injury, chain of events must have the ff: requirements to maintain proximate causation (1) each event must have a causal connection with its immediate predecessor or is part of a natural and continuous sequence; (2) the chain must be unbroken by an efficient intervening cause.