Superfly (1972)

Continuity mistake: The protagonist is weilding his karate skills against the crooked cops in the final fight scene. One of his foes is wearing a white fishing cap. Superfly belts him and knocks of the cap, there is a cut and then the cap is on again. The cap is on and then off again twice more in the same fight scene.

Eddie: I know it's a rotten game, but it's the only one The Man left us to play. That's the stone, cold truth.