Deliberate mistake: When Randy is playing with Agent Rodriguez's gun (after first meeting him), when he accidentally fires it, you can tell the film inexplicably cuts forward a few frames into the same shot, as Randy's body suddenly shifts position and the gun is facing upwards, rather than at an angle as it was the frame before.
Balls of Fury (2007)
1 deliberate mistake
Directed by: Robert Ben Garant
Starring: Christopher Walken, Maggie Q, Dan Fogler, George Lopez
Factual error: Karl Wolfschtagg's Olympic uniform should have read 'DDR' (Deutsche Demokratische Republik, the German name) rather than 'GDR', the English name for East Germany. Olympic country names are customarily rendered in their native language.