novus actus interveniens

The fact that the bouncer’s act may have been a novus actus interveniens, or an intervening act, is part of the analysis of whether legal causation has been established and whether the appellants should be held legally accountable for the death.... The Manitoba Court of Appeal held that, in order for novus actus interveniens to apply to sever legal causation, the intervening act had to be, in some way, extraordinary or unusual.