Friday the 13th Part 3: 3D (1982) - 13 major mistakes

Continuity: When Chris knocks Jason out with the shovel, the position of unconscious Jason's legs changes between shots.

Continuity: When Debbie is killed in the hammock, in all shots of her, the quilt covering the hammock net has patterns sown on it, such as flowers. However, in the closeup of Debbie as the knife comes through her chest, the quilt covering the hammock is the same one as before, however you can now see it is suddenly the other side of the quilt.

Plot hole: Jason somehow manages to get the two halves of Andy's dead body on the wooden ceiling rafter, with no blood dripping onto the hammock and staining it, or getting none onto the floor. Debbie then gets into the hammock, and about a minute later, blood starts dripping - for no apparent reason. Why?

Continuity: When the camera pans past the window, to the door, showing Chris walking up to the cabin, there is no painting hanging next to the door. When she gets in and talks with Rick, there is a long painting hanging the the right of the door.

Visible crew/equipment: When Loco, Fox and Ali stand by the van before they steal the gas, the long black boom pole is clearly reflected in the back window of the van.

Revealing: When the snake leaps out of the cage, you can see a dodgy looking fake snake attached to a wire spring.

Continuity: When Chris stabs Jason's hand, she stabs his right hand. In the shot of Jason coming downstairs, after Chris has jumped from the window, his left hand is all cut and bloodied for this shot.

Continuity: When Harold finds the rabbit in his store, it is in a crate of vegetables. Between shots, the vegetables which are in all of the crates change; for example some of the broccoli stems turn into lettuces in the next shot.

Visible crew/equipment: After Vera says "uh-oh," as her and Shelley sit in the car outside the grocery store, the camera pans around to the side window. You can see a hooded cameraman reflected in the small triangular window, as the camera pans.

Continuity: When Chris runs into the bedroom away from Jason, there is a long decorative picture hanging to the left of the window, and between shots a long piece of brown string, hanging down the painting, alternatively appears/disappears.

Continuity: When Shelly throws his wallet to Vera, he has a silver band around his left arm. Then when he says "Excuse me, but I believe that's my wallet", it has disappeared.

Continuity: When Chris comes out from the green door waving a knife at Jason, the green door closes all the way behind her. It cuts to Jason and then back to to Chris, and behind her in the background the green door is now wide open.

Continuity: Jason approaches Loco with a pitchfork with five prongs, but the pitchfork that enters Loco's stomach has only four prongs.