Revealing mistake: When Hightower throws his frisbee to Proctor and sends him flying, Proctor starts flying away before he catches the frisbee.
Revealing mistake: When Lassard starts spilling golf balls from his golfing bag in the airport, look closely. Lassard is activating some sort of trigger/handle mounted on the bag to release the balls.
Revealing mistake: When Hooks is carrying out her 'crowd-control' sequence, she causes the crowd to step back into a pool. However if you look closely, not all of them fall into the pool by accident, as a few turn round and deliberatly step forward into it.
Revealing mistake: Near the end of the film where Proctor kicks the chair towards Harris, if you look closely you can see the two grooves/rails that the chair slides along.
Revealing mistake: In the plane, House moves to the right of the plane and makes it turn sideways, but neither the soda cans behind nor the magazines in the rack move, revealing the camera trick.
Chosen answer: He had two other movies come out that same year (High Spirits and Cocoon). He chose to do those movies over Police Academy.
Paul Brannon