Revealing mistake: As the studio executive falls down and backwards in his chair, the wheels attached to the back for the stunt of rolling across the office are visible.
Revealing mistake: While Funn and Bell are warding off their attackers by throwing Coke cans at them from the machine, Eggs is busy rewinding the retrieved film reel around his body. However, when he's done 'winding', it's obvious the amount of film wrapped around him is significantly less than what was on the film reel.