Continuity mistake: 1st shot: Chopper's girlfriend leaves the car; the headlights are on. 2nd shot: Chopper leaves the car to go up to her stoop to talk to her (through a closed door) and after she refuses him, he runs back to his car (old-school vehicle, far before the advent of headlights that turned themselves off) and 3rd shot: the headlights are OFF.
Continuity mistake: When Chopper and co. are in jail planning, one of the two men stabs him continually. It goes to a shot from behind Chopper and you can see that the knife has no blood on it.