According to the DVD commentary, the two angry gentlemen who were the victims of the "Golf Course Airhorn" stunt would originally not sign a release form to be featured in the movie until the production crew took them out for a few drinks. The two gentlemen eventually agreed to sign their permission.
According to Steve-O, the Jackass cast barely got paid anything by Paramount Pictures in the first movie. He said in the H3 Podcast that he only made $65,000 from its $80,000,000 gross.
When Johnny Knoxville claims that he was Lon Chaney's lover after being thrown out of the liquor store, Knoxville actually had no clue who Chaney was. He saw Chaney's star on the Hollywood Walk of Fame as he was thrown out and thought it would be a funny thing to say.
Loomis Fall came up with the idea of the "night pandas" segment because he wanted to go to Japan. The crew agreed to bring him along simply because nobody had the heart to tell him that pandas are from China, not Japan.
The Japanese fortune teller says, "Nihongo o wakarimasu ka?" to Chris Pontius as Party Boy, to which party boy simply nods and sits down. The fortune teller had just asked him, "Do you understand Japanese?"