Friday the 13th Part 2 (1981) - 37 mistakes

Visible crew/equipment: As the camera moves in on the shower curtain when Alice is taking a shower, the shadow of the camera is seen on the curtain.

Deliberate "mistake": At the beginning, Alice turns on the tea kettle and it starts whistling less than a half a minute after it's turned on. It'd take alot longer.

Revealing: When Alice moves toward her window with the ice pick and the cat jumps in, it's obvious a crew member threw it in.

Continuity: 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.

Continuity: 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.

Continuity: 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.

Continuity: 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.

Continuity: 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.

Continuity: 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.

Continuity: When Scott is dancing with Muffin the dog, Muffins little bow is dark blue. But through the window shot, her bow is bright purple.

Continuity: 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.

Continuity: 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.

Audio problem: When the band starts to play the guitar solo doesn't match the guitar player's fingers or picking.

Plot hole: When the counselors are dividing up who is going into town to the bar and who is staying, Paul tells them only a limited number can go because there are only two cars. They leave in a little bug-looking car and a pick-up truck. Then, when the girl is freshening up for the guy in the wheelchair, she goes outside to what is presumably her car, searches the front seat, and finds the hair brush she is looking for. I guess technically, there are only 2 cars and 1 "truck" but the truck is the other vehicle that goes into town, so presumably he meant 2 "vehicles" which would be incorrect since a 3rd was obviously left behind.

Continuity: 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.

Continuity: 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.

Visible crew/equipment: When Terri is back at the cabin looking for a knife, she crouches down giving us a clear view of the mirror. Look closely, you can see a crew member carefully moving in the right side of the mirror.

Revealing: When Jason slits the guy's throat who is hanging upside down in a tree, look closely and you will see that Jason slits the guy's throat with the dull side of the machete blade.

Continuity: When Jason slits Scott's throat, he slits straight across, yet the wound is diagonal.

Audio problem: In the second shot of the band playing, the band members are singing into their microphones, but no voices are heard.