6. Gary Busey
Often confused to be other crazyman Nick Nolte (the two seriously look like they could be brothers), Gary Busey is the big blond jerk Mel Gibson fist fights at the end of Lethal Weapon. Before that he had played Buddy Holly in 1978, a role for which he received an academy award nomination. Since then he has been in several smaller roles that sometimes go overlooked, but still he has always been around and, no, he's not Nick Nolte. Busey is an interesting case. While he has never had a real "meltdown" so to say, almost every public appearance by him leaves people shocked and awed by just how bizarre and insane he appears. Just pictures of him alone are enough to make you wonder at his mental state. The show Family Guy summed it up when they cut to Gary Busey asking himself "how we doing?" in the mirror and the reflection of himself is an evil clown with huge teeth and snake hair. Most attribute Gary Busey's outbursts of weird to his tragic 1988 motorcycle accident where the trauma done his skull left him with permanent brain damage. Unlike Nolte, whose problems stimulate from alcohol and has been arrested, Gary Busey seems harmless enough and even fun to be around. Or is he? In 2010, I had a friend who personally met Gary Busey while he was sitting at his table at a horror film festival (he was also the killer in The Gingerdead Man). My buddy approached him to ask what it would take to get Gary Busey to star in his movie. This conversation almost ended in a fistfight.