Plot hole: In one gruesome scene, the killer hangs Natalie's friend in the woods and then crashes a car into a tree. Natalie escapes and comes back with campus security (who didn't bother to call the police even though a murder had just been committed). When Natalie and the guard get to the murder scene, all evidence is gone. How did the killer manage to remove the body and all pieces of the car within ten minutes (not to mention somehow hide the dent left in the tree by the car crash)?
Plot hole: When Natalie and Damon are in the woods when Damon goes to the bathroom and the killer approaches him from the behind, it cuts to the scene with Natalie in the car. Then she gets out and sees the killer then runs to the car. You see the killer put rope on the car but how does the killer hang Damon without Natalie noticing?
Factual error: After Tosh got her wrists cut, she wasn't discovered til the next morning. After so long blood stops flowing from a wound so the blood from her wrists wouldn't soak through the sheet as seen.
Continuity mistake: At the end when Brenda flies through the windshield, she goes into the water face down. When Natalie and Paul see her floating, she's face up.
Revealing mistake: When the killer calls Parker, when we see the phone it's not showing details from caller ID, it's just showing the address book.
Visible crew/equipment: When Sasha falls from the stairs, you can see a safety wire.
Continuity mistake: Natalie picks up the urban legend book at the library. After she bumps into Sasha, the book is now thicker.
Revealing mistake: When Natalie discovers Tosh's body, a close up shows Tosh visibly blink her eyes.
Continuity mistake: When Natalie is in the car, she is unaware that tied to the back is rope which is also hanging Damon from the tree. When she reverses, this causes him to crash into the windshield. However between shots the way he is falling and the way he lands is inconsistent. (00:29:55)
Plot hole: When the girl in the car gets killed she is decapitated with an axe. All you see is her noticing someone in the back of the car then a shot of an axe coming through the driver's seat window. How did the killer manage to swing an axe in a car and take off someone's head whilst he was sitting right behind her?
Revealing mistake: In the chase sequence, we get a shot of who is supposed to be "Brenda" driving, but we see the eye of a man, not a woman. Brenda doesn't have bushy eyebrows, and her eyes are a different shade of blue. (01:20:05 - 01:24:20)