When David and Marie park in front of Karl's wig shop, his name is misspelled on the lettering as "Karl Gualt Fine Wigs".
During the fight scene at the carnival, the stuntman for Robert Redford's character can be seen as he has a different hairstyle, and appears to be older than Redford. Ronnie Rondell Jr., who plays the teenager, is doing his own stunts, as he was a professional stuntman as well as an actor.