Kindergarten Cop (1990) - 6 major mistakes

Continuity: In the beginning of the film John and Detective O'Hara are driving. She suddenly gets really sick, so John stops the car so she can get out.  She runs and then throws up. When she comes back to the car she trips on a log that was never there before. 

Continuity: After Kimble walks in on Phoebe and Henry in the bedroom, the positions of the pillows change (in one shot a pillow falls of the bed, but is back on in the next), and the sheet of paper move around the bed sheets too.

Visible crew/equipment: When Mrs. Sullivan pulls up along the road, three crewmembers pushing the camera along are beautifully reflected in the side of her car.

Continuity: When Kimble is getting the kids to bring a toy back to the carpet, some children clearly sit down twice between shots, most noticeable a boy in a striped shirt holding a big yellow truck.

Continuity: On Kimble's first day as the kindergarten teacher, he's wearing a white shirt with jeans and a jacket. When he shows up the next day and is talking with the mother of one kid, he's wearing a maroon shirt with khakis. They then cut to the kids doing the pledge of allegiance, then to the kid eating everybody's lunches. In that shot Arnold is wearing the white shirt, jeans, and jacket. But then, they cut to "Who is your daddy, and what does he do?" sequence, and Arnold is back in the maroon shirt and khakis. It seems the "Lunch-box kid" part was in the wrong spot.

Visible crew/equipment: When Crisp and his mother pull up, just before Crisp goes into the toy store, in the bottom of the car's windsheild you can see a boom mike bobbing about.