Back to the Future, he was on set. It was the scene where Marty is putting the pole on the back of the Delorian at the end with the lightning to finally get back to the future. Then he hops into the car and closes the door. Fox kept screwing it up, and he would walk off set cussing, he would then smoke a cigarette and return and try again. This went on all night. Several hours into this during one of these takes, someone beeped my brothers walkie talkie extremely loud, that he forgot to turn off. Everything stopped and Michael J. Fox looked directly at him. My brother simply turned around and went for a long walk.