Continuity mistake: When Kyle is fighting the Tooth Fairy, he sets his sleeve on fire to burn her and get her away. A couple of shots later he is shown putting the flame out with his hand. His shirt is completely unburned.
Continuity mistake: When Kyle is driving the car with the windshield smashed out, his hair is not moving at all.
Continuity mistake: At the very beginning after the Tooth Fairy kills Kyle's mom, he is waiting in the bath tub with about three bad scratches on his neck. The next day he is being put into the police car and they look like really faint scars.
Continuity mistake: When Larry is driving Kyle out of Darkness Falls, Kyle pulls a gun on him to get Larry to turn back to the hospital. The camera angle changes from a rear shot to a side shot a few times, during which Kyle goes from looking directly ahead without the gun raised to facing Larry with the gun raised. This happens a couple of times just before the tooth fairy flies in front of them and causes the car crash.
Continuity mistake: When the police are taking Kyle-as-a-kid after his mother's death he's stood by the car (looking fairly evil) with many bloody cuts on his face and neck, but the next shot of him sat in the car shows he has just the one tiny unrelated nick on his cheek he had at the beginning of the film before the Tooth Fairy's attack.
Continuity mistake: When Kyle, Kaitlyn, and Michael are going down in the elevator, the floor-indicator light switches from three to two. Then ten seconds pass, the elevator jams, and the light is still showing floor two. Pretty pokey elevator that takes more than ten seconds to move from floor to floor.
Continuity mistake: When Kyle flies through the windshield after the car slams into a tree, shouldn't Kyle have some sort of concussion or cuts on his head from going through something so solid as a windshield and glass?
Continuity mistake: Throughout the movie where light is used to keep the tooth fairy at bay, her "sensitivity to light" seems to change a lot. A light stick that generates no heat and throws a dim glow keeps her away, but she'll come up close enough to a hot gas lantern to be decently illuminated.
Continuity mistake: When Ray grabs Kyle in the bar, his left hand grabs the front of Kyle's shirt. But when it cuts to another angle, he's suddenly holding his arm.
Continuity mistake: When young Kyle is talking to the girl in his bedroom you can see scratches on the right side of his face. He doesn't actually get these till later on when the tooth fairy comes for the tooth.
Continuity mistake: After the tooth fairy kills Kyle's mom he runs to the bathroom and locks the door, before the tooth fairy blows open the door you see a shot of the door knob and it is clearly unlocked.
