Continuity: After the pizza man is discovered dead, Kim puts the phone down on the desk before running into the living room. While Coach Jana waits on the line, it goes dead. In the next shot, Trish picks up the phone and speaks to an operator just before Russ Thorn cuts the phone line.

Audio problem: When Russ Thorn is walking towards Linda in the high school hall, you can hear Linda's scream before she visibly screams.

Continuity: When Linda is hiding from Russ in the showers, the position of the white towel on the side changes.

Revealing: When Coach Janna hits Russ Thorn with the fire poker, it's very apparent that it's made out of rubber.

Continuity: When Trish is speaking on the phone to Diane, she winds up a pair of toy wind-up shoes. In the first shot the toy shoes walk as far as the center of the desk, then run down. In the next shot, they are now right at the edge of the desk.

Continuity: When Russ Thorn chases Linda down the corridor, she runs right to the end of the corridor, then heads down the last row of lockers, and Russ follows her (there is also no poster on the wall.) In the next shot of Russ running down this row of lockers, it's now apparant that it's not the end row; because there is no end wall, and now there is also a poster on the wall behind him.

Continuity: When Valerie slices Russ's chest, he falls into the swimming pool. After he climbs back out, and attacks Valerie and Courtney, he is now suddenly completely dry, despite having fallen into the pool seconds ago.

Continuity: When Coach Jana is cut across the chest by Russ, blood gets on her tee-shirt that says "Speedo", between the two E's. In the next shot, as she falls to the floor, that blood has vanished.

Continuity: When the PE coach arrives home from school, her friend drills a peephole through her door. The hole in the door is rough and ugly, yet in the next shot it's neater and has gained a metal eyepiece.

Continuity: When Trish knocks a glass of wine to the floor, whilst preparing the food, the spillage decreases between shots.

Visible crew/equipment: After they discover the dead Pizza Man, Trish gets onto the phone to call for help. It switched to a shot looking through the window, showing Russ outside, watching them. However as the camera pans past these windows, the reflection of a second man is seen.

Continuity: When Valerie is making the jug of Kool-Aid, she puts the bag of sugar down on the counter, standing perfectly upright. In the next shot, when Courtney comes over, the top of the bag of sugar is folded down, and then during the scene, it changes back and forth.

Visible crew/equipment: When the PE coach arrives home, and walks inside, as she bends down to put her bag on the floor, you can see some equipment moving in the glass frame of the photo above her, on the shelf.

Continuity: When the two boys are walking away from the telephone repair woman's van, one of the boys drops a book, and hands his friend two folders, and picks up his book. Suddenly in the next shot the friends hands are empty, and the two files are back in the other boys hands.

Continuity: When Russ Thorn grabs the telephone repair woman and drags her into the van, she drops her appointment book on the ground. In the next shot of the boys walking away from the van, the book that's supposed to be on the ground has disappeared.

Revealing: Trish picks up the hot coffee pot, which cracked on the stove, with her bare hands.

Continuity: When the Pizza Man rings the doorbell, Trish puts her glass of strawberry shake on the tray that Jackie is holding. In this shot three glasses are on the tray. However in the very next shot, there are only two glasses on the tray, and Kim now has one glass in her hand.

Continuity: When Trish's parents are leaving in the car, Trish's mom tells her to not forget to lock the doors and windows. Between shots, Trish's stance and the position of her arms and hands on the window changes.

Continuity: When the Pizza Man falls through Trish's doorway, dead, between shots his position changes, and so does the position of his pizza box. Also, the greasy stain on the pizza box changes shape, and blood on the pizza box disappears too.

Continuity: When Trish is putting some of her old toys away in a brown paper bag, she picks up her dog teddy. In the first shot the ear of the dog teddy is folded upwards, lying on it's head. In the reverse shot the ear hangs down, normally.