Continuity mistake: The location and intensity of Lavinia's purple hair highlights vary throughout the movie. For example, the purple highlights on the right side were far more pronounced (two wide, distinct, vivid lines) when she got home compared to when she first met Ward. Lavinia rode her horse Comet home, so her hair would have been wind-blown and the highlights would not have been likely to be neatly straight down, especially since she has long curly hair. (00:05:10 - 00:07:13)
Continuity mistake: After the intro, the protagonist receives a phone call from her sister. When she turns around to check out of the TV screen, one of her fellow swimmers, with quite characteristic purple hair, is immediately seen sitting down. Back to the view from inside the locker, the same aubergine-haired girl is coming from the lockers to the benches, to go sit. (00:03:45)
Continuity mistake: After Sara's mother sits at the table, the left side of Sara's hair suddenly has two clumps of strands running down her cheek and flipped in front of her chin. Sara's hair changes a few times with different camera angles. (00:44:52)
Continuity mistake: The position of Richard's legs change when he is dead on the stairway landing. Initially, Richard's right leg is bent at the knee and pointing toward the lower flight and his left leg is straight, going up the wall to the next flight. Richard's legs quickly switch from this position when Grace is approaching the landing to his right leg going up the wall and his left leg not visible when Grace reaches the landing. An aerial view then shows Richard's legs back to their original positions. (01:36:27 - 01:37:12)
Continuity mistake: When the girls bring a birthday cake into Judy's room at the first time, her bed sheet is patterned with what looks like flowers but when Judy is fast asleep the next time, the sheets are plain white. (00:52:30 - 01:15:30)
Continuity mistake: The inspector is showing the singer the gruesome images of her friend. As he says "It's how we identified the remains", she raises her right hand, but in the next shot it's with the left hand that she's touching her lips. (00:04:45)
Continuity mistake: After take-off, Mr. Anderson's hair changes a few times while he was talking to Rochelle. His bangs are combed back, but then he has strands hanging down his forehead and the top of his hair is dishevelled. After the camera shifts to Rochelle and back, Mr. Anderson no longer has the strands down his forehead but the right side is messy. When the camera shifts again, Mr. Anderson's hair is neatly combed back. (00:14:54 - 00:15:25)
Continuity mistake: When Charlie throws Scott over the balcony, he crashes into the chandelier and it partially tears away from the ceiling. Sparks ensue, but the light remains fully functional. The camera switches to Scott on the floor then back to Charlie where the chandelier can be seen worth all but one light out. There is no visible difference in the room lighting. Later, when Charlie is chasing Scott and Annie with the shotgun, Charlie screams "Lights out!" and shoots a fully functional chandelier.
Continuity mistake: Cory threw the tire iron across the road, where it landed near a tree in the second or third row (lower right-hand corner of the screen). Reina and Vlad walked well past that area, much deeper into the woods, where Reina found the tire iron - despite her even telling Vlad the tire iron couldn't have gone so far. (00:06:00 - 00:09:57)
Continuity mistake: The girl and guy are in a hotel room and she kisses him good bye. You see her go out of the door and the door handle is on the left side and no chain hanging. Then when you see the door a few seconds later the door handle is on the right and the chain is latched.