Continuity mistake: When the sniper starts shooting at the audience, at one point he hits a guy in the press sector. However the blood splatter at the victim's shirt appears yet before the bullet actually breaks the window.
Continuity mistake: As Bob crashes his car into the caravan, you can see that the car is already damaged.
Continuity mistake: As Mel and company go to drive into the movie studio, the windscreen alternates between down and up and back between shots.
Continuity mistake: Right after the last song John Paul Jones is seen taking his guitar off and resting it on an amp.The scene switches to Robert and when he points to his right JPJ is repeating the action.
Continuity mistake: When Cinderella is running away after losing her slipper, she lifts her skirt, and she is wearing only stockings. In the next scene when she is singing a reprise of "He Danced With Me", she starts dancing, and she is wearing her normal shoes.