Continuity mistake: Kelly was wearing a white thermal top over a white sleeveless undershirt. After he was thrown into the garbage can, his white thermal top was wet against his back, so he was no longer wearing the undershirt. (00:03:54 - 00:05:43)
Continuity mistake: After Wes was clobbered and on the floor, he had a long stream of water/mucus coming out of his nose or mouth and his lips were wet when he was standing up, but his lips/mouth/nose were totally dry when the killer put his gloved hand over Wes' right shoulder. (00:33:40)
Other mistake: "Sally" the Great White Shark rammed Emma into a rock (or other hard object) underwater and Emma only got a small cut above her right elbow. It isn't clear how fast Sally was swimming, but Emma was rammed with force (and appeared to hit her back). A female Great White Shark weighs about 4,000 or 5,000 pounds, so Emma would be expected to suffer a major (not minor) injury under the circumstances. (00:05:24)
Continuity mistake: Bernice's bangs go back and forth between having a small section separated from the rest to not separated. Before she kisses Thomas, her bangs are separated, but combed together when they are done kissing. (00:21:56)
Continuity mistake: James lit the cigarette he gave Amanda, and she was shown taking one puff. Amanda tells part of the Empty Man story and the ashes on the tip of her cigarette are the same when she takes a second puff. After continuing the story for about two minutes, the length of the ashes still have not increased when Amanda is about to take the third puff. (00:37:21 - 00:39:53)
Other mistake: The entire movie takes place during the overnight dark hours. Limited lighting from the car and flashlight somehow manage to illuminate faces, photos, signs, etc. Filming in the dark surely has its challenges, and there has to be a proper balance between lighting and ability of viewers to see what is happening. The "convenient" lighting would be a "deliberate mistake" except for one factor: A full moon (highly illuminated) is shown without radiating the light expected from a full moon. (00:26:25)
Continuity mistake: In the opening scene, the blue car is parked on the far right of the screen or at least one car length from the doctor's front door. Dr. Huggins says goodbye to the couple with the baby, who walk toward their car. After the burglars-to-be (turned robbers) are shown watching from a distance, the camera returns to the doctor's front door. The blue car is now near the center of the screen and it drives away toward the right of the screen - going past the place it had been parked.
Continuity mistake: Views of Michelle's car wreck were inconsistent. When the car veered to the right and was headed toward the tree, the driver's view showed most of the car was to the left of the tree trunk. On impact, it looked like the right side headlight hit the middle of the tree trunk. Michelle got out and a rear view showed the tree trunk roughly lined up with the steering wheel (i.e, more than half of the car was to the right of the trunk). After impact, both headlights were shining in front of the tree.
Other mistake: In this film, when they find the picture of Nancy (from the original Craft film), the image is of Nancy in the restroom of the original movie. If you watch the original film, the image that was used of Nancy shown in the new film would have taken place during the scene where Nancy, Bonnie, and Rochelle confront Sarah about wanting out of the coven. But during that scene, no cameras were in sight and nobody was taking pictures.
Continuity mistake: In the opening scene, pay attention to Evan's girlfriend's glass. When Isaac gets up and goes inside, the amount of liquid in her glass slightly changes between shots.
Continuity mistake: The sizes, locations, and smoothness of the pieces of glass remaining in the wall mirror after Aidan smashes it with a bat change. Initially, there were a few large and several smaller jagged-edged pieces around the top and upper-half of the right side. Later, there were four relatively large smooth-edged pieces spaced around the upper half of the mirror - one in each upper corner and one on each side at the middle. (00:15:48 - 00:19:33)
Continuity mistake: Whilst Jung-seok is driving with his family on the first day of the zombie outbreak, after he says "All other roads must be blocked", his sister looks to the left to face her son in the back seat. The shot then cuts to focus on Jung-seok, and the sister can now be seen looking straight forwards out the window. (00:01:45)
Continuity mistake: The amount and location of dirt on Christine's face is inconsistent, ranging from being very thick and obvious to barely visible, if at all. Sometimes it extends down her neck on the right side. When her hair covers most of her face, no dirt is visible - until she turns her head and the hair is away from her face. The intensity and location of the redness on her neck also varies. (00:03:31 - 00:04:48)
Continuity mistake: Brahms was quite clean for having been buried under dirt and leaves. No dirt fell off Brahms' body when Jude pulled him out of his "grave" and there did not appear to be dirt in his hair. When Sean (Jude's father) held up Brahms, the doll looked relatively clean - or cleaner compared to when Liza (Jude's mother) started to wash him. (00:14:10 - 00:15:45)
Continuity mistake: Theo lays Susanna's phone down - when it cuts back to her phone is lying in the opposite direction.
Continuity mistake: Take notice of the desk lamp as Charlie and Al are talking in Charlie's new office. As the camera switches back and forth between their face to face conversation, the green glass cover of the light keeps changing position too. This happens even after Al leaves. This was probably done to keep the light out of the camera during filming. (00:13:50)