Continuity: When Dr. Sayer and the group of patients are in the dance hall, he is sitting at a table with a drink. He picks up a cherry that is lying on a napkin near the drink and eats it. One of the female patients asks him to dance, and as he gets up the cherry has reappeared on the napkin.

Factual error: After Robert De Niro awakens, Robin Williams takes him on a ride around New York and Robert is amazed by all the surroundings. The movie is set in the early 1970s, but you can see plenty of vehicles around from the time that the movie was filmed (1990). Notice the square headlights that originally appeared in the late 70's.

Continuity: When Dr. Sayer is talking to the nurse on the steps at the end of the movie he comes down the stairs with his coat wide open. As he talks to the nurse it is closed if not buttoned. Then when they leave together it is wide open again.

Continuity: In the scene where Robin Williams leans out of the window to speak to the Nurse who is asking him to go out with her, his shirt is one color/pattern. When the scene shows Robin Williams running out to meet her, his shirt is a totally different color/pattern. Yet the scene does not allow time for a clothing change.

Continuity: When Leonard stays at the hospital instead of going with the group on the bus, he goes to the lunch room and stands in line with the girl he likes. As they are sitting at the table eating, watch the milk glasses on the tray. There is one on the right side of Leonard's tray and one on the left of hers. In the next shot they are both on the right side.

Continuity: After Dr. Sayer and Leonard get ice cream and go to Dr. Sayer's home, Leonard is sitting on the couch and on the table in front of him is a plate of saltine crackers. The amount of crackers and the way they are lying on the plate change.

Continuity: When Robin Williams is talking to the nurse near the end of the film, and then they go off for a walk, the shots of Robin show the nurse's scarf over her shoulder, then the shots of her show both pieces of her scarf down over her body. This happens every time the shot changes.