Trivia: Actress Amy Adams makes a small cameo during the "Master Exploder" sequence. She is the woman who mouths "I love you!" to Jack Black, and is subsequently covered with the brains of the man whose head explodes.
Trivia: Troy Gentile plays young JB (Jack Black). In his previous role, "Nacho Libre" Gentile played young Nacho, who was played by Jack Black. Incidentally, "gentile" means one who is not Jewish, and Jack Black was born and raised Jewish.