Maniac Cop 2 (1990)

Continuity mistake: In the strip club, the serial killer puts the dollar bill in the dancer's g-string twice.

Visible crew/equipment: You can tell when the maniac cop is getting burnt in the prison, that it's a stunt man wearing a protective bag over his head.

Factual error: The blonde cop is thrown into a hardware store. She then grabs a brand new, shiny chainsaw that was sitting on a cardboard stand-up display. Then, of course, she goes to attack the maniac cop with the weapon. A new chainsaw that was on display wouldn't have gas in it.

Factual error: When the Maniac Cop catches up with the blonde cop after wrecking the taxi, she pulls out a revolver and shoots him. She shoots him eight times. However, a revolver can only fire six shots before it needs reloaded.

Audio problem: When the angry cab driver is yelling at the female cop that stole his taxi, the words you can hear him saying do not match is mouth.

Plot hole: When the clerk is scratching the lottery tickets for the robber, when he scratches the second ticket he only scratches off two out of three numbers on the ticket, but still says it's not a winner.

Continuity mistake: The clerk scratches two lottery tickets for the burglar, but in another shot three scratched tickets are visible.