London - Mel Gibson (45) says acting is like therapy for his "basically mad personality. My insanity doesn't come out very often because to exist in society you have to work on that and keep it in check," he told the Radio Times in an interview.
As a youngster, he revealed, he stapled his sister's head, knocked out a younger brother and three days before his audition for Mad Max, the movie that would make his name, he was involved in a bar-room brawl with a rugby team over a woman, the bruised results of which got him the part.