Deliberate mistake: In the scene where Joan and the kids pile into the station wagon after Stanley is kidnapped, Joan tells the kids to hold on tight and puts the car into reverse. However, in the matter of seconds that have gone by, Joan hasn't even started the car, yet she was able to put it in reverse and drive off. Even if she had the skills to start it that fast, you would hear the car turn over. The car is never heard turning on.
The Stupids (1996)
1 mistake - chronological order
Directed by: John Landis
Starring: Tom Arnold, Bug Hall, Jessica Lundy, Alex McKenna
Joan Stupid: Note to self: must buy hand held tape recorder. Then I will no longer be speaking into the garage door opener.