Shaft's Big Score! (1972)

Plot hole: Shaft's friend has been killed at the beginning of the movie. Bad guys show up at his sister's door for a fake flower delivery, and Shaft kills them. He asks the dying baddie "Who put a contract out on me?", but how does he know? We as audience know there is indeed a contract on Shaft since we've seen the conversation with the mobster, but as far as Shaft knows, all evidence points at Arna being the target, and he even explained the money-related motive a mere minute before.

Sammo

Shaft: You might catch cold.
Rita: I suppose its immodest of me to walk around like this in front of a stranger. But, any enemy of John Kelly's, is an old friend of mine.