Internal Affairs (1990)

Factual error: When officer Van is shot with a shotgun his body is lifted off the ground and knocked several feet backward. One of the basic laws of physics states for every action there is an equal and opposite reaction. The amount of energy required to lift and move an adult man would be tremendous and the person firing the gun would have been subjected to the same force.

Dennis Peck: How many cops you know, huh? Got nothing. Divorced, alcoholic, kids won't talk to them anymore, can't get it up. Sitting there in their little apartments, alone in the dark, playing lollipop with a service revolver?

Trivia: Richard Gere and Andy Garcia did not get along during the filming, and much of their fighting in the elevator sequence is real.