Visible crew/equipment: When Fenwick and Boogie are driving in the country watching the woman on horseback, the window on Fenwick's side of the car goes up and down several times in different shots. When the window is up, the cameraman can be clearly seen reflected in the glass.
Continuity mistake: In the kitchen scene when Steve Guttenberg has asked his mom to make him breakfast she chases him around the kitchen with a knife. First the blade is down in her hand, then up, then down again.