Deliberate mistake: During the sting attempt towards the beginning, Douglas confronts Snyder on the roof of the building. A helicopter rises up from nowhere without making any sound prior to that.
3 Ninjas (1992)
1 deliberate mistake
Directed by: Jon Turteltaub
Starring: Victor Wong, Max Elliott Slade, Chad Power, Michael Treanor
Continuity mistake: When Rocky and Colt go to the bathroom to attack Hammer after he drank the laxative, Colt thrusts a plunger to Hammer's face. As Colt thrusts it backwards, Hammer's face gets pulled forward, sending his ponytail over his head. In the next shot his hair is neat and tidy, not over his head.
Fester: Hey dude, what time does school get out?
Hammer: I don't know. I never stayed to the end.