I just finished watching the Roddy Piper one. One of the funnier stories in the documentary was about how Piper started a riot by insulting Mexicans and the Guerrero Family. He told everyone that he was sorry for insulting the Guerreros and asked for everyone to stand so that he could play Mexico's national anthem as a peace offering. Well he gets on his bagpipes and instead of playing the national anthem he starts playing La Cucaracha.
All hell broke loose at that point.
Also, they told a story of how he'd worked the heel angle so well that he was actually stabbed by deranged fans on 3 different occasions. One of the incidents resulted in him being stabbed in the heart. Docs said another inch or so and he would have been killed.
Edit: Just did some research and he wasn't stabbed in the heart. It was an inch from the heart. During the documentary they mentioned that when he was stabbed in the chest (by the heart) that blood was squirting out like water from a water gun with every heartbeat. So he had to put his thumb over the knife wound until they reached the hospital.