Continuity mistake: As their car is towed, the guy hangs up the phone and it remains on the hook. When it cuts the phone is hanging off the hook, as they are running from the phone booth. (00:15:00)
Continuity mistake: When the girl who owned the dog is hit in the bum with a slingshot, she is hit in the right butt cheek, yet she grabs her left butt cheek. (00:19:00)
Continuity mistake: After Scott hits Terri in the bum with the slingshot, he holds the slingshot up by his shoulder. In the next shot his arm is down by his side. (00:19:05)
Continuity mistake: When Ginny shows up at the campgrounds late, as she gets out of her car to go speak with Paul, she pushes the driver-seat sunsheild down. After their talk, she goes back to the car and the sunsheild is up. (00:20:35 - 00:21:55)
Continuity mistake: When Ginny promise to Paul that she never will be late again, Paul puts his arm around Ginny over her shoulder. When it cuts his arm is lowered. (00:21:30)
Continuity mistake: When Scott is dancing with the dog, in the shots from inside the cabin, the collar on his shirt is up. But from the shots outside the cabin looking in, his collar is down. (00:26:50)
Continuity mistake: When Scott is dancing with Muffin the dog, Muffins little bow is dark blue. But through the window shot, her bow is bright purple. (00:26:50)
Continuity mistake: When Ginny puts on her red robe and fixes her hair in front of the mirror, some of her fringe is sticking out. When it cuts her hair is hanging down perfectly. (00:28:35)
Continuity mistake: When the two kids are heading for 'Camp Blood' they get to a fence with a sign reading "No trespassing". The boy puts his foot on the right side of the sign pushing the fence down. When it cuts his foot is on the left side of the sign. (00:35:35)
Continuity mistake: When Terri is undressing to go skinny-dipping, she changes out of her clothes and her hair is dry. In the very next shot, she is entering the water and her hair is moist and slicked back. (00:44:25)
Continuity mistake: When Terri is walking back to the cabin to get a knife, her pants are untied at the waist. When she reaches the cabin, they are tied with a bow, yet when walks back to Scott, they are untied again. (00:47:45)
Continuity mistake: When Jason slits Scott's throat, he slits straight across, yet the wound is diagonal. (00:48:25)
Continuity mistake: In the film Ted is at the bar with Paul and Ginny and Ted is flirting with the waitress behind the bar.The waitress has her wash rag slung over her right shoulder. The scene then cuts to a frontal shot of her and now the dish rag is now slung over her left shoulder. (00:52:10)
Continuity mistake: When Mark is on the porch, the camera is Jason's point of view and Jason is sneaking up behind Mark. However, then the camera switches to Mark's face and there is no one behind him. (00:58:05)
Continuity mistake: When Vicky goes to her cabin to change, the window goes from having no curtains to having curtains. (00:58:05)
Continuity mistake: When Jason takes the spear, he tosses the mask down, on the fifth step up. Later, when Vicky goes upstairs, the mask is on the sixth step up. (00:59:25 - 01:01:50)
Continuity mistake: When Paul and Ginny leave the bar, there is a faulty, unlit small headlight on the front left of the car. When they get back to camp the light is fixed and working. (01:01:00)
Continuity mistake: When Jason enters the cabin you can see an umbrella. Yet when Vicky comes in, she's using that same umbrella. (01:01:35 - 01:03:50)
Continuity mistake: When Jason surprises Vicky in the bedroom death scene. Jason pops out of the bed and his bag that he wears on his head is tied up. Then when they cut to Jason lowering his butcher knife, his head bag that he wears is un-tied. (01:02:20)
Continuity mistake: When the girl runs to the car to escape Jason, the wipers are in a position different from when the car had been turned off. (01:03:20 - 01:07:25)
Answer: Probably from inside the building he was standing in front of.
lartaker1975