Friday the 13th: The Final Chapter (1984) - 47 mistakes

Continuity: In Part III, Jason's fingernails were neat and trimmed, but in Part IV (which occurs the very next day), they are long and black.

Continuity: When the paramedics are rolling Jason, his feet are not facing them, but when they come into the room with Axel, Jason has switched positions.

Continuity: Nurse Morgan's name tag is on the opposite side to the pocket with the pen in it, on her white nurse dress. Yet when Jason stabs Nurse Morgan, her name tag is right next to the pocket.

Continuity: Right before Jason slits Axel's throat, we see him grabbing Jason by his elbow. When it cuts from a shot above we see him holding Jason by his wrist.

Revealing: When Trish and her mom are jogging, a bush in front of them moves before they run by it, caused by the cameraman brushing it as he walked backwards.

Factual error: When Tommy is playing Zaxxon on his computer, he is about to go into a barrier and die. Firstly the audio of the ship crashing happens before it hits, secondly, in the next shot the ship has reappeared.

Continuity: When the six teens are driving along in the car singing, between a wide shot and closeup of the car, the road and scenery behind them changes.

Continuity: When Trish's car stops, the licence plate goes from dirty to clean.

Continuity: When Sam asks Sara to come into the water, Sara says no. Then Sam says "Then I'll go under water and stay there until you do", while placing her hands on the edge of the pier. When it cuts to a close-up of her she is resting her arms on the pier instead.

Continuity: When Tommy is looking under the hood of the broken down car, it shows someone approaching and you see that they are wearing grey trousers. The person ends up being Rob, but Rob wears black trousers.

Continuity: When two of the teens are dancing to the rock music, one boy walks over, changes the record and then places a vinyl record on top of a box. In the next closeup the vinyl record he placed down has gone.

Continuity: When Jimmy and one of the twin girls go upstairs, Ted is left behind with the other twin. He tries to give her a charming look while both his arms arm down. When it cuts from behind him he is suddenly holding his left arm up.

Visible crew/equipment: When Paul is stabbed by Jason's harpoon and lifted up in to the air, the wires attached to him are visible on either side.

Revealing: When Trish is inside the tent you see a shadow of a man outside. However it is dark outside so there could not be any shadow cast on the tent from the outside.

Continuity: When Jimbo gets his hand impaled on the counter with a corkscrew by Jason, the counter is clear, but a few scenes later as Jason leaves the kitchen, there's a pot holder laying on the counter.

Revealing: When Jimbo is killed with the cleaver, you can see that the cleaver has the front cut out of it to accommodate Jimbo's head.

Continuity: Jason slashes Jimbo in the face with a cleaver. It then cuts to another scene happening elsewhere. Then when it cuts back to the scene with Jimbo, Jason now has a large bloody knife instead.

Revealing: When Tina is thrown out of the window by Jason, you can see she is wearing soft body suiting on her legs as she hits the car.

Revealing: When Tina is thrown out the window you can see the roof of the car is partially damaged and very flexible when she hits it.

Continuity: Doug's hair changes between shots when he is in the shower.