Other: In the scene where Leslie is fighting the soldiers, one soldier hits a second soldier with his rifle. The rifle can be seen to bend around the soldier's body and then straighten again.

Continuity: This takes place at the beginning of the movie, in the balloon scene. When Leslie is hanging from the balloon, we see the balloon soaring over the land very quickly. However, when Leslie climbs up to the balloon to parachute out, he is still right where he started.

Deliberate "mistake": Professor Fate's auto, when it raises itself off the running gear, has no means of propulsion. The drivetrain is not connected to the drive axles by either a driveline or chain.

Continuity: You can clearly see TV antennae on the Eiffel Tower ... supposedly in 1908.

Continuity: At the beginning of the pie fight, Jack Lemmon says, "You wouldn't dare." and George Macready hits him with a pie. Very little of it sticks to Lemmon's face; most of it falls off. There's a quick cut to a shot of Tony Curtis, then another cut back to Lemmon, whose face is now totally covered with pie.