Factual error: The Song "Looking for the Magic" by the Dwight Twilley Band plays on repeat several times throughout the movie, however it comes up as track 1 on the CD player each time."Looking for the Magic" was never the first track on a Dwight Twilley CD - It was track 2 on the group's 'Twilley Don't Mind' album released in 1977. You can tell the disc is not a homemade mix CD by the printing on the top of the CD the first time it is placed in the tray.
Continuity mistake: When the slasher is breaking down the door, the knife position keeps changing between shots.
Factual error: In the opening sequence when the man is killed the blood spatter is just not possible - the attacker is using his left hand and attacks the right side of the victim - the blood comes from the opposite direction. (00:05:00)