Revealing mistake: The car that goes over the cliff is at least ten years older than the car it's supposed to be - the 1957 Plymouth Fury that Diamond was driving. It's obviously old 1940s stock footage.
Revealing mistake: When Diamond and Miss Miller are driving in the country, Diamond is turning the steering wheel in wide arcs as though he's on a winding road. But the rear-screen projection footage behind them is moving in a straight line.
