Other mistake: When JB is leaving the cafe, he pays money, but he did not buy anything.
Tenacious D: The Pick of Destiny (2006)
1 other mistake - chronological order
Directed by: Liam Lynch
Starring: Ben Stiller, Jack Black, JR Reed, Kyle Gass, Ronnie James Dio
Continuity mistake: As Jack and Kyle are walking up the "Guitarway to Heaven" in the Rock Museum, they vary between marching completely in synch with each other and out of synch. They are still walking directly next to each other, so it is not due to one of them changing their pace.
Open Mic Host: We've got one spot left. You guys got any new material?
JB: What we got's gonna turn your brain into shit.
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.