Continuity mistake: The Packard convertible stolen at the beginning can be seen with and without a rear window during the chase scene.
Revealing mistake: In the scenes inside the space capsule, as Roy goes through the sequence, the wires holding him up in the floating sequences, and the crackers when trying to eat, are visible.
Factual error: Shortly after the scene where Robin Hood stops the pie cart there is a long shot and in the distance a car is driving from left to right. (01:00:00)
Revealing mistake: When the sky bike is flying during the competition it is obviously suspended from a crane as you can see the wires.
Continuity mistake: Pauline is driving in the one-way street, of course the wrong way. There are several continuity errors between cuts; for instance when you see the 'boy' in the back seat laughing hysterically behind her, in the background you can see the red pick-up she nearly has a frontal with in the next shot. (00:05:00)
Revealing mistake: Inspector Emil arrives at the morgue; pay attention to the body, just before he asks "You are...?" to Armstrong, the sheet covering the cadaver rises and fall as the departed takes a few deep breaths. (00:32:00)
Factual error: Druids worshipped things like nature, not Greek gods like Zeus.