Continuity mistake: At the Policeperson's Dance, Copeland spills punch over the Commissioner's wife's white dress. As the camera view switches, her dress is already stained before she is splashed.
Continuity mistake: When the wimpy police officer and his wife are arguing about her joining the police academy, she backs his police car out of their driveway and a hubcap falls off. Later on, though, it mysteriously reappears in later scenes.
Continuity mistake: When the rich character, Hedges, is driving along the highway, he is in a limo with an oval window behind the door. However, the shot of the inside of the limo has a square window at the back and an angled door window.
Continuity mistake: When Commandant Lassard is talking to the group in his off the first time, there's one shot out the window of a line of jogging cadets led by a person in red and they pass a group of cadets standing. The next shot out the window and the jogging cadets are in the previous position passing the standing cadets. The line is too long and there's not enough time to be a 2nd group or for them to jog around the circle driveway.
Continuity mistake: When Proctor leaves the hotel room while waiting for Mahoney's "aerobics instructor" to get ready, he's supposed to be naked. However, if you look closely in the shots leading up to his getting into the elevator, you can see he's wearing a pair of light flesh-coloured briefs.
Factual error: During the speedboat chase scene, the Toronto skyline is visible, including the CN Tower. This movie is supposed to take place in an American city.
Continuity mistake: When the new recruits come off the bus at the beginning, Mahoney is talking to them through his megaphone. Towards the end of his speech, the camera angle changes and we see Mahoney standing with his arms down beside Hooks, yet we can still hear him speaking through the megaphone. How did he achieve that?