Other mistake: In the Rube Goldberg Test scene, read the subtitles when Rip Taylor is talking. In the actual movie (where all we see is Johnny Knoxville coming out of the catapult) the subtitles have him saying "Oh, child." at one point. In the extras (where we see the complete Rube Goldberg Test), the subtitles show Rip saying "Oh, John." for the same line.