There is a scene in the art studio where the main character works. When he walks by a painting that one of the artists is working on, it only has a small part finished, but when he walks back by that painting (still in the same scene), the painting is completely finished.
Near the end of the movie, the guy who played Lenny on Laverne and Shirley is walking towards the camera, and the overhead mike pops down a couple of times.
There is a scene where one of them jumps on a horse, and you can see one of the crew holding on to the reigns as the horse throws its head back.