Factual error: When the crooks are on their getaway from the bank raid in the hearse, you can see 1960s cars through the back window when this scene was set in 1950.
Other mistake: Dean Jones and Connie Stevens are riding in a gondola of a skyway ride at a seaside amusement park. The gondola they are in is obviously on a studio soundstage. It is much larger than the gondolas shown in the rear-screen projection. In addition, there are no riders in any of the other gondolas and the gears and cables of the ride make absolutely no sound.