A Fine Mess (1986) - 8 mistakes

Continuity: At the end of the movie, Spence is seen with Claudia in a western movie. He walks through the swinging bar doors with a cigar in his mouth. He takes a few steps forward and the size of the cigar has nearly doubled.

Continuity: When Spence jumps into his car to escape Binkey at the racetrack, he just jumps in the car, puts it in gear and drives off. He never started the car up.

Continuity: When Dennis's girlfriend goes to see him at the godfather's house, her car is seen parked directly in front of the house, where the godfather's car was just parked moments ago.

Continuity: When Spence's brother in-law goes to call Spence after his car accident with Binkey and Turnip, he only dials 3 digits the first time, then 6 the second time, then 5 the third time.

Continuity: After Dennis punches Spence in the nose the piano starts playing and Dennis just pushes it to turn it off even though every time they had to turn it on and off before then they had to use the on/off switch.

Continuity: The damage to the front grill of Binkey and Turnip's first caddy changes throughout the car chase with Spence and Dennis from a small hole to half the grille.

Continuity: When Spence's brother in-law almost crashes into Dennis' girlfriend's car, he's driving straight down the road and she makes a left from the intersection to cut in front of him, but when the camera angle changes back to the inside of the brother in-law's car the intersection that he should have just passed is nowhere to be seen.

Continuity: When Dennis and Spence are trying to outrun the cops in the car that Spence stole from the racetrack, the camera shot from the inside shows them driving on a regular street with the yellow lines and everything but the camera shots from the outside show them driving on blacktop streets with no lines whatsoever.