History of the World: Part I (1981) - 6 mistakes

Revealing: During the Inquisition song when Right Before Mel Brooks Plays bongos on the guys heads he slides in from behind the wooden torture things. If you look closely the hair on the stunt double sliding in is darker than Mel's.

Visible crew/equipment: When Comicus and his entourage are on the road to Judea, the tire tracks of the vehicle carrying the camera are blatantly clear in the lower part of the picture.

Revealing: When Comicus et al are running from the Roman soldiers, Miriam pulls Comicus through a secret marble door. When it closes, you can see the glue residue revealing that it's Formica.

Continuity: In the scene where Caesar orders his guards to kill and seize Mel Brooks, he calls for more wine and a servant comes to pour him some If you notice his shirt, it is clean and white. In the shot right after he calls for it, when the servant is walking up behind Caesar laughing, you can see that Caesar's shirt is stained purple. This is caused from repeated takes, because right after the servant walks up he spills the entire container on Caesar. But yet, in the finished movie, Caesar's shirt is purple before it even gets spilled on.

Audio problem: When Comicus is announced in Caesar's court, the trumpeters play "Hooray for Hollywood". Notice that the music starts before they get their instruments to their mouths.

Visible crew/equipment: During the Inquisition song, right before Mel Brooks says "Skit skat Vodely dat Boopadyday" or something like that, the shadow of a pole is visible on the steps to the right.