Continuity mistake: When Trish's car stops, the licence plate goes from dirty to clean. (00:28:10)
Continuity mistake: 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. (00:58:25 - 01:01:20)
Continuity mistake: When Trish and Tommy push the cupboard in front of the door, the figurines and items on the shelves move/fall off/reappear between consecutive wideshots and closeups. (01:15:10)
Continuity mistake: 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. (00:07:00)
Continuity mistake: 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. (01:16:00)
Continuity mistake: 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. (01:16:25)
Continuity mistake: 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. (00:12:00)
Continuity mistake: 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. (00:43:45)
Continuity mistake: When Gordon jumps out of the window, shards of glass breaks off, flying all around him as he jumps. In the next shot all the shards have just disappeared. (01:10:05)
Continuity mistake: When Trish grabs the TV to hit Jason with, the big lamp gets knocked to the floor. Moments later as they leave the room, the lamp is back up to standing. (01:16:20)
Continuity mistake: After Trish jumps out of the window, the position of her feet and legs, and the planks of woods around her, change between shots. (01:18:15)
Continuity mistake: 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. (00:34:35)
Continuity mistake: 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. (01:22:00)
Continuity mistake: 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. (00:15:35)
Continuity mistake: When Sara goes into the second floor bathroom to dry her hair, there is a bench in the hall. Later, when Jason chases Trish upstairs, the bench has moved across the hall. (01:06:30)
Continuity mistake: When Tommy is pretending to sleep when his mom comes into the room, he is on his stomach when she pulls the blanket over him. In the remaining shots starting with when his mom is closing the blinds, Tommy is suddenly laying on his side. (00:51:15)
Continuity mistake: Trish swings the machete at Jason, and knocks his mask off. In a behind shot she holds the machete with both hands. In the next shot she only holds it with one. (01:21:05)
Continuity mistake: Trish swings the machete overhanded, but in the next shot she knocks Jason's mask off underhanded. (01:24:25)
Continuity mistake: When Jason kills Doug in the shower, there are two red lines on his hockey mask, under the eyes. However later, when Jason bursts through the window and grabs Tommy, the lines are gone. (01:05:10 - 01:14:45)
Continuity mistake: 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. (00:58:30 - 01:01:20)
Answer: You can see from the inside of the house Gordon jumping through the window by himself. It shows him jumping on the table then through the window.
lartaker1975