Continuity mistake: When Derek dies after being shot, tied up on the stage prop, his head slumps down with it looking down to his right towards Sid with his forehead tilted to the left. When it cuts to another angle at a close up of Sid, suddenly his head is tilted the other direction. (01:37:40)
Continuity mistake: Mickey and Sid at the beginning of their struggle end up facing each other with a Greek pillar between them. The position of their hands changes between shots, literally touching at some point depending on if Olyphant's hand is higher or lower. (01:39:25)
Continuity mistake: When Mickey grabs the gun after the 'pillar fight', he holds it straight in the first shot, gangsta-style sideways in the next. (01:39:35)
Continuity mistake: When Sidney incredulously asks "Mrs...Loomis?" her left hand is raised at shoulder level, but her arm is straight in the next shot. (01:40:20)
Continuity mistake: When Debbie Salt is holding the knife on Sidney, the knife changes positions from time to time. (01:42:30)
Revealing mistake: When Mickey is flying through the air after getting shot at the end of the movie, if you look closely you can see it's a stunt double. (01:46:00)
Continuity mistake: During the struggle between Debbie and Sidney, in the phase that involves the fake stone block Sidney's hands have a different position on the block between shots, and so does the knife, stuck in it in different spots. (01:46:10)
Revealing mistake: When Mrs. Loomis dislodges the knife from the stone and lunges towards Sidney, the person falling back is not Neve Campbell, who comes back for the close-up shots. (01:46:15)
Continuity mistake: When Sidney and Mrs. Loomis fight with the knife, the weapon is bloodstained in different ways depending on the camera angle. (01:46:20)
Continuity mistake: Cotton shoots the killer, who when lying down has a giant hole in their throat. It wasn't there when both the killer and Sidney were falling backwards. (01:48:40 - 01:49:05)
Factual error: At the end of the film there is an LA county sticker on the ambulance, but the events are nowhere near LA. (01:52:05)
Revealing mistake: When the killer attacks Sid's bodyguards, the younger one has blood on his throat before the killer slashes it.
Suggested correction: That's because Ghostface smashed the window before slashing the cop's throat; it's obvious the cop got cut by some of the broken glass.
Continuity mistake: When Sidney is about to get in the car with the policemen, she has a rather large noticeable spot on her chin. In the following scenes, it is gone.
Continuity mistake: When Gale kisses Dewey she has no more lipstick on her mouth, then in the next shot she has lipstick on.
Revealing mistake: When Mickey draws the gun at the end of the movie, a hammer is heard being pulled back. Yet the gun that Mickey is using is hammerless.
Plot hole: After Sid and her friend get out of the car, they run away from it. Yet somehow while they are talking, the killer climbs out of the car and ends up behind them without them seeing a thing.
Continuity mistake: A pimple is visible on Sidney's chin as she says goodbye to Derek before getting into her ride with the two detectives and Hallie. Minutes later, in the scenes inside the car, the pimple has completely disappeared, even in the very extreme closeups.
Continuity mistake: After the accident - when the car is seen from behind - you can't see the killer (it's before Sid crawls over him).
Audio problem: At the theater showdown, Mickey shoots Gale and Sidney says, "Gale," but her mouth is closed.
Continuity mistake: In the make-out scene with Gale and Dewey, Gale's lipstick is smeared on her face, but there's none on Dewey's face.
