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

Visible crew/equipment: When Samanth is pretending to hid underwater until Sarah agrees to go swimmming, when Sarah is searching for Samantha, is shows a shot of Samantha coming from underneath the docks. When she does, you can see it is a dummy coming from underneath the docks.

Revealing: Trish tells Tommy to go get a hammer and some nails. When Trish then shouts "Tommy, hurry" you can see the shelf to her right get bumped by somebody in the crew, who was obviously standing nearby.

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: Just before Trish jumps out of the window, as Jason runs forward to get her, you can see he has normal, human eyes, instead of his disfigured, odd eyes, seen at the end of the movie.

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

Revealing: Near the end when Trish is running from Jason, Jason crushes a lamp on the floor and for an instant it becomes pitch black. A moment later, the room is lit again by a sudden occurrence of "moonlight."

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: When Trish has entered her house after escaping from Jason, she hears him behind her in the doorway, and swings at him with a machete, but hits the door frame. You can see there's a mark from a previous swing.

Revealing: Near the end when Jason throws the hammer at the girl, it sticks to the damaged part of the wall after it hits. But it's just against the wood with the flat top, there's nothing to hold the hammer there and it's only hit the wood on the other side of the wall. They probably used a magnet to attract and keep it there for safety reasons.

Character mistake: When the car drives by the tombstone that says Pamela Vorhees, it says she died in 1979. But she didn't die until 1980, when the first Friday the 13th was made.

Deliberate "mistake": When Jason is going next door to chase after Trish, he pulls Jimbo's body down from the doorway and begins walking towards Trish's cabin. He is seen walking by himself. However in the next scene, he throws Rob's body through the window. There was no time for him to go back and get the body.

Continuity: After Tommy slices Jason in the head with the machete, he picks the machete up, and in this shot his shirt is dry. In the next shot when Trish goes over to hug him, his shirt is wet, then dry again.

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.

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.

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.

Continuity: After electrocuting Jason with the TV, he falls backwards, and the door is left open. When Trish and Tommy walk over, the door is shut.

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: As Jason breaks into Tommy's room, a purple monster mask on Tommy's wall starts to spin, then stops a few shots later, then starts spinning again in the next shot.

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