I remember when I was very young a scene in a movie where there was a woman in a Pontiac clamshell wagon and there were some bikers or a gang or something that was terrorizing the lady and she was locked in her car at night. They started beating on her car as if they were trying to get in to her and scare her. I don't remember the rest of it, or even the name of it. I remember seeing the movie in the 80s though.
