Ace Ventura: Pet Detective (1994) - 6 major mistakes

Revealing: When Ace and Melissa are in bed together having sex if you look close enough you can see that she is wearing underwear.

Continuity: When Ace rescues the dog and replaces it with a toy-dog, the toy-dog is in an impossible position. Ace had to place it there when the door was still open, but if door was closed after that the man should have knocked over the dog.

Audio problem: At the beginning, when they steal the dolphin, you hear the peel-out sound effect as if the truck was on a paved road, but they were on grass.

Continuity: When he is in the asylum, he is trying to hide in a little cardboard box from an employee of the building, so he crams himself into a box and when the man leaves he breaks out of it. He ends up completely squishing the box underneath him. When the camera comes in for the close up shot, the farthest side of the box from the viewer is now undamaged.

Revealing: At the end of the movie, when Ace is at the stadium and he attacks the mascot, his name is called and he looks up to smile and wave. He is surrounded by players from the Miami dolphins, but if you look through the crowd of players you can see the stadium seats are empty.

Continuity: When Ace is trying to work out what Irnhorn and Finkle have to do with each other, his dog sits on a photo of Finkle and its hair does not cover the face, the shot moves to Ace and then back to the dog and now its hair is covering the face of the photo without even moving.