Continuity mistake: The headlights from the cop cars that were right on her tail are now gone and the road behind the car is dark when she hooks the right on Cunningham Rd. In one second the cops have fallen so far back it takes them more than ten seconds before they pull into frame. (00:51:52)
Other mistake: The road block would have been visible to Megan before she turned her head and said "keep an eye out for road blocks". (00:50:00)
Continuity mistake: In this scene where Jason grabs Sissy he grabs her by her shoulders, but the next shot when he pulls her out the window his left hand is on her neck and his right hand is between her legs. This was the only way Jason could pull her through the window without her lower body slamming into the window frame. (00:49:00)
Continuity mistake: The position of the Lemon Brus can beside Sissy's bed changes. In the first shot it's turned around backwards facing the box behind it so you can only read Lemo. In the next shot where Sissy grabs the can the label is facing the camera and you can read the entire label Lemon Lime Brus. (00:46:38)
Continuity mistake: Jason cut the phone line and leaves a deep gouge in the post but in the following shot the line is intact and the post has no gouge in it. (00:46:16)
Continuity mistake: When Jason looks at the camp and you can see the Camp Forest Green sign there is smoke coming out of the chimney of the cabin with the welcome sign. In the next shot where Jason walks into the camp there is no smoke coming from the chimney. Also, there is a change in the lighting visible by looking at the shadows created by the bushes on the left. (00:44:58)
Continuity mistake: The position of the blinds behind Cort changes. It's all the way down at first but the next shot the blinds are rolled halfway up. (00:40:27)
Revealing mistake: You can see through the RV and it has been gutted. It's completely empty except for a stuntman that is sitting in the middle and not the drivers seat because the RV is about to land on the driver's side. (00:40:56)
Continuity mistake: In the RV bathroom the curtain rod they knock down in the struggle could not have possibly been there when Jason dragged her into the bathroom. The rod is lower than the top of the door and would have been knocked down. It's obviously not there when Jason jumps out. (00:39:50)
Visible crew/equipment: When one of the female counselors is walking towards the window because she heard a noise you can see the top of the camera shooting the angle from outside above the window sill. (00:44:40)
Continuity mistake: When Megan and Tommy drive up on the roadblock, Officers Pappas and Thornton chase after them. Notice the precipitation on the windshields of the police cars, and Megan's car. Seconds later when Officer Pappas is on the radio with the Sheriff, his windshield is dry, without any rain drops on it at all. (00:49:00)
Continuity mistake: When Tommy runs down to the boats he is carrying a sack with him. He almost loses the sack to the ground, but when it cuts he has his hands firmly around it again. (01:08:40)
Revealing mistake: When we see a closeup of Jason opening his eyes for the first time he is supposed to be lying down in his coffin. One of the maggots falls across his face. If he was really lying down the maggot would never fall like that. (00:06:15)
Continuity mistake: When Sissy and Paula are in the cabin as the girl screams, Sissy holds her hand up. When it cuts to them running, her arm is suddenly down. (00:32:15)
Revealing mistake: When the lightning strikes the metal pole in Jason's grave for the second time, a wire is visible attached to the tree where the electrical explosion appears. (00:06:00)
Continuity mistake: During the scene where Jason kills the couple in the volkswagen and again during the police chase it goes from night to day to night again. (00:13:00)
Continuity mistake: The propeller damage to Jason changes between shots. (01:18:00)
Continuity mistake: In Part V the mayor says Jason was cremated, which would mean there would be no body to "bring back" for this film.
Continuity mistake: Jason's machete disappears from his hand as he walks after Steven through the woods.
Continuity mistake: The sheriff shoots Jason in the head with his revolver and makes a hole by Jason's right eye. Jason pulls Tommy underwater and begins to choke him and Tommy passes out. There is a close up of Jason's face and the bullet hole is now gone. When Megan tries to save Tommy she cuts Jason's throat with the boat propeller and the bullet hole is visible again on Jason's mask. (01:07:25 - 01:18:00)
Chosen answer: He wasn't really angry, more like confused and annoyed at having paint shot at him.