Harry rents a car when he is in Florida. When the car is filmed from the front or the back, the car has a rear view mirror. When the car is filmed from the side, the rear-view mirror is missing.
When Griffith appears wearing the blue men's shirt and leans over him with multiple buttons undone revealing underage cleavage, in the immediately following shot it is buttoned back up.
When Quentin (James Woods) takes off from his place on his motorcycle after Harry (Gene Hackman) confronts him about the car accident on the movie set, the engine sound that is heard is that of a large four-stroke motorcycle engine, but his motorcycle is a mid-late 1960s Yamaha 250 scrambler, a small-displacement two-stroke twin.