I need help remembering the title of a horror movie I saw in the early 90s. It's about a dude with long hair who finds a little demon creature that grants him wishes. There's a scene where he's speeding down the road in a car, the little demon gets loose in the car, and the dude starts punching the demon in the face. There's another scene where something happens in a bathroom stall, but I can't remember what. At the end of the movie I think the dude turns into a demon himself. Does anyone know what movie I'm talking about?
