Revealing mistake: As Machine Gun Joe runs slowly runs over a fisherman in a small brook, he stops and "peels out" on his head. You can see a film crewman in the driver's seat doing the actual carnage.
Continuity mistake: Jonathan explains how to deal with a biker, demonstrating on Blue who's sat on his bike close to the rail. Yet when he's talking to the new guy (Toughie)Blues bike is in the middle of the track and when Toughie comes around the track to attack Jonathan it is back in its original position.
Continuity mistake: The not-so-friendly waitress tells Chaney he has to pay a nickel for his third refill of coffee. During this bit, the newspaper on the counter keeps changing position between shots; open, folded one way, folded facing the opposite direction. (00:03:45)