Revealing mistake: At the end of the racetrack scene, the bike stops before the curve where the staff is waving the yellow flag for an accident. In the close-up of the asphalt you can see skidmarks exactly following the path the bike makes, and the odds that the racetrack where F3-like cars are competing has motorbike-sized prints exactly coming out at that curve are of course pretty low. (01:27:20)
Revealing mistake: A brawl in the bowling alley erupts, started by Tex Cobb tossing on the ground a bad Jay Leno stunt double (hair color does not even match). (00:58:40)