Continuity mistake: When Jimmy goes into the big house, he does not close the door, but while he is dancing you can see behind him the door open/close/open.
Continuity mistake: At the end of the film, Jim Belushi dresses as his mother to trick the warden and enter the prison. After he enters, he changes clothes and reemerges as himself. The bright red nail polish he had on is now completely removed from all his fingernails, yet at the same time he forgets to wipe his lipstick.
Continuity mistake: When Charles Grodin is on the payphone at the airport his Filofax is open. After he leaves and Jim Belushi finds it, it's suddenly closed.