Continuity mistake: In the very last scene when Bo is hugging Stanley before the game it reveals his "Never Back Down" tree tattoo on his lower left arm. Yet right after in the closing credits and presumably depicting that same game it showed his left arm after taking a shot with the tattoo removed.
Continuity mistake: The views of Pinero's dead "trophy wife" from opposite sides of the bed were not consistent. From Seth's view, Pinero's wife was lying mostly on her right side with her hair covering her head/neck but otherwise not visible, and her right arm extended outward from her waist area. From the other side of the bed, Pinero's wife's long wavy hair was over her left breast and should have been visible from Seth's position but was not. The wife's right arm also extended outward from her shoulder area. (00:00:22 - 00:01:19)
Continuity mistake: The time of day changes multiple times during the first half of the movie. When Danny is talking to Papi, Papi is outside and the sun is in the west indicating late day. In Danny's angle the sun is right overhead. There are multiple times when it is full on overcast in one angle and cloudless blue sky in the next.
Plot hole: Seventeen-year-old Jane knew they went to the house to "strip it" (cabinetry, hardware, etc). After removing a chandelier, Jane went into another room and, for no legitimate reason, used a sledgehammer and made a hole in the wall. There just happened to be a stash of money easily accessible via the hole, which was half-way up the wall. (00:26:14)
Continuity mistake: The monkey figurines (or charms) on the beads hanging from the rearview mirror change positions from being more horizontal (side-by-side) to vertical (one below the other, and at different distances). Swaying from the SUV's movement might explain some change, but the weight of the monkeys should have kept their positions more balanced (side-by-side or one at the top and the other at the bottom). (00:03:30)
Continuity mistake: Dan and Allen were close together when they were talking on the dirt road. Based on how far Allen threw the blindfold toward Dan's feet, Dan's feet/boots should have been visible. The blindfold was close to Dan's feet in the wider shot. (00:15:13)
Continuity mistake: The man picks up his duffel bag and swings it over his shoulder, but does not use its strap. He runs through the woods, and the strap is over his shoulder. Just before he runs onto the beach, he swings his bag over his shoulder, as if he does not use the shoulder strap in the woods. (00:01:40)
Continuity mistake: Harry sets his pen off the left side of his notepad and has both of his hands to the right of it, but the pen is on top of the notepad when the camera shifts. (00:06:40)
Continuity mistake: Overlooking the sudden drop from 1:02 to 0:17 seconds on the countdown clock, the one-second interval beeps are not accurate. In the countdown from 10 seconds, there are approximately or precisely 10 beeps, then the countdown clock shows 4 seconds remaining. (00:19:55)
Factual error: The owl that JP was looking at made a "who who" sound. The owl may appear to be a Snowy Owl (one many people are familiar with), but it is a Barn Owl. Barn owls are not "true" owls and it is the true owls who "give a hoot." Barn owls don't hoot; they make a screeching or squealing sound which can be piercing (and eerie to some people). (00:32:50)
Continuity mistake: The orange feather toy that was in the cat bed with the cat when Sam got to the bookstore was not there a couple camera shifts later. (00:25:33 - 00:26:25)
Continuity mistake: The sky (sun versus clouds and color - blue, white, or gray) changes frequently during the few minutes when Lara is leaving the site until she returns to retrieve her bag. Before she falls into the hole, the sun is shown near the horizon, about to set, but the sun is shining on her in the hole. A setting sun would not be able to emit rays into a distant hole. (00:05:34 - 00:10:15)
Other mistake: James told Det Vargas he left the bar "2:30, give or take" and Vargas responded, "bar closes at 2:30 [AM]." When Star approached James at the bar, she said, "When I see a guy alone at the bar at three in the morning..." It is questionable if Detective Vargas was correct about the closing time. Traditionally, bars in L.A. closed at 2:00 AM. CA's Business and Professional Code on serving alcoholic beverages apparently now allows serving alcohol until 3:00 (not 2:30) AM - was this in effect? (00:04:33 - 00:11:50)
Factual error: The Artist lit a match and candle in his cell. Both are contraband in prison (especially for someone scheduled to be executed). Matches pose a risk of fire/arson and deliberate burning injury or death to a person. Candle wax can be used to prevent cell and other prison doors from locking, creating an escape risk. Also, The Artist's prison cell appeared to be much bigger than a master bedroom (standard size 14'x16'). Prison cells are around 6'x8' or 7'x12'. (01:17:45)
Plot hole: Mike carried Sophie into the hospital and walked through the halls yelling, "I need a doctor" until he ran into Sophie's Dr. Thomas. Sophie was put on a cot and rolled into a room where Dr. Thomas immediately began examining her. Mike completely by-passed registration, triage, etc, which wouldn't be tolerated at an emergency room. Emergency rooms are highly likely/almost always back-logged with patients, many with urgent conditions yet still might wait hours to be seen by a doctor or nurse. (00:06:45 - 00:07:20)
Revealing mistake: A white truck could be seen in Tamra's rear window, following her car at varying distances. After Tamra hit Randall on his bike, the white truck was still there but gone when the camera returned to a front view of Tamra. Use of a green screen - the truck could not have gone past the accident or "disappeared." (00:03:35 - 00:04:10)
Other mistake: At the end the camera bulbs would not work as they are electric. This is proven when the music starts after the creature leaves the area. (02:01:00)
Continuity mistake: As the SUV pulls off alongside the curb, there are trees with orange-coloured leaves on both sides, but the leaves are green when the ladies are talking in the stopped SUV. The leaves from the tree that is about 15' from the curb are right outside the passenger-side windows. (00:10:15)
Continuity mistake: During the "Quiet Game," the taser model changes when Rachel licks it and finishes the challenge.
Continuity mistake: The amount of wine in Annie's glass (as well as Nic's) decreases then increases without her adding any. Annie had almost one-half a glass of wine when she poured some into Nic's glass, then it was closer to one-fourth full. A little later, Annie's glass appeared to have the amount she initially had when she approached Nic. (00:13:59)