Corrected entry: Sidney is talking with Stu and Tatum at the lockers when someone runs buy wearing the Ghostface mask. She runs down the hall, bumping into Billy, then goes into the bathroom and meets the killer. We know it isn't Billy because we just saw him, but how would Stu get into the bathroom without passing by Billy and Sidney?
Corrected entry: When Billy, Sidney, and Stu are in the kitchen, Billy licks the blood on his fingers and says "Corn syrup. The same thing they used for pigs' blood in Carrie." However, after Sidney and Stu had sex earlier, there is no way Billy would have had time to smear corn syrup on himself while being stabbed by Ghostface (Stu). We don't see him rub anything on himself. He couldn't have been wearing a packet of fake blood, because Sidney would have noticed it while they were taking off their clothes.
Corrected entry: Since there were people coming and going to the party after Tatum was killed, and their cars were parked out front, don't you think someone would have noticed a body hanging from the garage door? The news van is also out in front of the driveway the entire time but apparently no one inside sees anything.
Corrected entry: Just before Sidney shoots Billy in the head, look at the Ghostface mask behind his shoulder. It looks pristine, but just after you see the big flash from the gun you see the mask has dry blood over it. (01:38:20)
Corrected entry: In the scene where Dewey and Gale are entering the house where the party takes place he talks to Sidney and says anything like "Hey Sidney" and she replies something like "Anything new about my father?". This is really strange because Dewey dropped Sidney and Tatum at the party about only 5 minutes ago. The conversation gives the impression that they have not talked to each other for a much longer time.
Corrected entry: When you see Sidney's dad tied up on the floor just in front you see Stu's bloody hand and you hear dripping blood but you don't see any blood dripping. (01:32:20)
Corrected entry: When Gale and Kenny are watching the "Rules" speech on the delayed tape, you hear Randy say "There are certain rules..etc." and when Randy said this he was standing by the TV. Then Dewey comes and knocks on the camera van, and you see Kenny turn off the tape. But when he turns it off, you can briefly see the tape, and Randy is sitting on the couch watching Halloween, when he should have been standing, explaining the rules, as you never see Kenny or Gale rewind the tape. (01:10:55)Hamster
Corrected entry: In the house when Sidney is attacked for the first time, she runs into her bedroom and tries to call the police using her house phone. When she realises it's engaged (because the other house phone is off the hook), she tries to contact the police via her computer. The police subsequently turn up. Problem is she only got as far as the computer asking what her emergency was. She never stated that she needed the police, so (a) how did the emergency services know what service to send to her, and (b) how did they even know who the request was from?
Corrected entry: At the very end when Sidney finds out who is doing the killing, and she's fighting and wrestling around on the floor with the killer, one minute she has black sneakers on, and the next minute she's wearing her boots when she walks through the door.
Corrected entry: Right after curfew is in effect, when Tatum and Sydney are sitting on Sydney's front porch, you see the killer in the bushes in the background. The very next scene is of the video store where both killers, Stu and Billy, are speaking to Randy. The next scene that follows directly is Sydney and Tatum in the grocery store where you see the killer's reflection on the cooler glass. How can the killer(s) be in more than one place if this is all going on at the same time?
Corrected entry: When the real killer comes into the room and stabs Billy quite a few times, Billy turns around to Sid, he cleans the knife (although there is nothing on it). Then the camera shoots to the killer and he cleans the knife off again, only this time there is a lot of blood on it.
Corrected entry: When Tatum is in the garage, she hears crashing noises and sees the cat. She calms herself and puts her arm on the fridge door as if she was going to close the door, but when the shot changes, her arms are still crossed and she closes the door with her foot. (01:02:30)
Corrected entry: In the scene where Sidney is in the car with the camera man, she sees Ghostface walking behind an intoxicated Randy, but later when she is approached by Stu and Randy (both saying the other is Ghostface), she locks them both out.
Corrected entry: When Sidney escapes from the killer in the news van she climbs out the back door that was closed all the time. Later when Gale drives away in the van you can see that the door is still closed.