Revealing mistake: In a scene where Frog is riding with the Bandit, she's resting her head on the center gearshift console. Although they're supposed to be cruising down the road, the automatic transmission shifter is in neutral.
Revealing mistake: While Dr. Wentworth is driving his car trying to shut off the loud music on the radio, the dashboard shows that the car's gearshift indicator is not in "D" for "Drive."
Revealing mistake: When the Black Knight kills the King's champion with his axe, you can see the flash and smoke from the charge which blows the armour apart. (01:32:00)