Revealing mistake: The candles on the long dinner table are numerous and clustered, but linear in front views of people seated at the table. Based on how the candles are disorderly arranged, it would not be possible to show a couple or few candles spaced apart in front of one person. (00:05:35)
Continuity mistake: Kareem's mom is talking to her coworker about the fact that her son asked for James to pick him up at school. When she mentions that it's not seen as the coolest thing to date a cop, and a white one at that, her friend goes from hand low, to smoking with that hand, to drinking from the cup, in the span of a few words and a couple quick cuts. (00:09:45)
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)
Revealing mistake: When the black cat was going up the staircase and got to the first landing, it turned its head to look directly at the camera, then continued climbing the staircase. (00:08:13)
Revealing mistake: Although it appears that Edgar (and later Norman) put his eye up to the hole in the wall to look into the opposite room, the eye is obviously fake. Too much of the sclera (white part of the eye) is showing and the upper eyelid is too far above it; the upper eyelid typically reaches or partially covers the top of the iris (colored part of the eye). Also, the eyelashes go downward instead of being curved upward. (00:18:05 - 00:19:49)
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.
Continuity mistake: After the scavenger hunt goes live, Jennifer follows it with her grandmother Sue and Aidan does so with his niece Emma. Aidan looks at the photos of participants and sees one of Jennifer and Sue at the art class, and right below is one of him holding Emma with the carollers in the background. Immediately after that, he picks up Emma in front of the carollers and takes the photo he had already been looking at.
Factual error: The film consistently mistakes Absinthe ban with Thujone ban. The United States Food and Drug Administration (US FDA) lifted the ban on Absinthe in 2007, 13 years before the events of this film. Thujone is still banned, and Absinthe products must contain less than 10 mg/kg Thujone content.
Continuity mistake: Tommy had a cup of coffee in front of him when he met Jaylene at the outside table. After Jaylene showed Tommy the picture of him and Sandy, the coffee cup was to the right of the ashtray and closer to Jaylene (as though it was hers). Also, the mini creamer cups that were on the saucer appeared to be gone. (00:07:17 - 00:07:54)
Other mistake: When Lomito was holding the little green ball with the smiley face on it, her flashlight was shining on her fingers/fingernails - all of which were long and manicured. The length of her fake fingernails - even if they did not exceed the department's policy on maximum length, such as one-fourth inch past the fingertip - probably were long enough to interfere with her ability to quickly put her finger on her pistol's trigger and shoot; the length interfered with her ability to perform her duties. (00:31:25)
Continuity mistake: The direction of the desk lamp's flexible neck varies with the camera's angle. Front views of Rodger show the top of the neck aimed toward the outer edge (length) of the desk and rear views of Rodger show the top of the desk lamp's neck pointed toward him sitting at the desk. (01:02:00)
Deliberate mistake: Zhang crushed and smeared several long red-hot peppers (cayenne?) in his hands to use as a makeshift weapon against thugs when rescuing Mei Mei. After Zhang smeared and pushed peppers into one thug's eyes, it is unlikely he would have been able to retain as much of the crushed peppers in his palms as he did. Also, holding the peppers in one or both of his palms would have interfered with grasping the second thug and redirecting his gun (without sliding off). (00:08:00 - 00:08:50)
Other mistake: Fran is unconscious near a gas stove as Marla comes to save her. As Marla is trying to move her, Fran moves her leg even though she is supposed to be unconscious.
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: Theodore rides once the tiny rollercoaster; the cart comes to a full stop and his left foot is in the space between the bars, but in the next shot the left foot is on the outside. (00:48:00)
Continuity mistake: At the "Wave Hair Salon", Ms. Gordon has a curler/roller at the top of her forehead. In some shots, it is straight, but in other shots it is angled. A little later, Christine goes over to Ms. Gordon and starts rolling down the curler to the top of her forehead as if for the first time. (00:08:04 - 00:08:47)
Character mistake: Deputy Becky said Mrs. Pierce was in shock over Vivian's murder. An EMT is shown standing next to Mrs. Pierce taking her blood pressure on top of her sweater/jacket (with a blouse underneath), which would interfere with an accurate reading. Mrs. Pierce's arm is also bent at the elbow instead of being straight. If Mrs. Pierce was truly in shock, the EMT should have had her lie on the ground with her legs/feet elevated above her heart. (00:12:21)
Continuity mistake: The grilled cheese sandwich was charred while it was still cooking, but not when Jason's dad served it to him. (00:02:00)
Other mistake: Based on where Carol is standing near the top of the stairs of her new apartment, more of the couch behind her should be to the left of the screen (like it is in a later shot). (00:48:10)
Continuity mistake: The amount/shape/size of the blood/cut on the bridge of Joey's nose varies, as does the obvious presence or absence of blood on the right side of his nose. (00:42:32 - 00:43:50)