Continuity mistake: The middle curtain on the passenger side of the RV is pulled open to different extents (toward the sides) when Drake is snooping around. Depending on the camera's view, maybe a foot of the curtain can be seen to the right. The other views show much more of the curtain, indicating it is not pulled to the side as far (and might possibly be closed). When a larger amount of the curtain is showing, there is also a small section of a pleat partially on the sill. (00:04:00 - 00:04:27)
Other mistake: While "dead" Mike is bent over his car's engine, his left leg moves. (00:32:40)
Continuity mistake: When Butch is talking to Dawn in his room, he puts on his headphones and begins talking to some unknown being and seems to be in a trance. His head is resting flat on his pillow as he grabs Dawn's arm. Just after she pulls away, Butch's hand is in the position as if he was still holding her. However his head is now resting up on the headboard. He couldn't have propped himself up with his hand in that position, especially in the matter of a few seconds. (00:40:40)
Continuity mistake: In the car at the start, when Hamilton says it's like the fourth blackout today, Michael corrects her and says it's the fifth. When he says this, he is leaning forwards some as he looks up out the windshield with his mouth partly open. It cuts to a different angle and suddenly he's leaned back in his seat fully and his mouth closed. (00:01:30)
Continuity mistake: In the basement when the girls are talking, one mentions to Chloe that she and Carl would make an adorable couple. Chloe's left arm is stretched up above her head in this shot. But in the next shot when she corrects her on the guy's name, it's suddenly down by her lap. (00:06:10)
Other mistake: During the murder in the stairwell, an old woman opens her apartment door outward, and Varg kicks it shut. Apartment doors always open inward, as did Euronymous' apartment in the same building.
Suggested correction: Euronymous' apartment door opens outward into the hallway, at least in the final scene it does when he's trying to get away from Varg.
Factual error: At the beginning 'researchers' are working on the 60th parallel in the province of nunavut. Nunavut is not a province; it is a Canadian territory. They appear to be working in the winter. At the 60th parallel, the winter would be almost dark and the sun would never be that high in the sky. Given that sun, it would be summer. In the summer, you would not have that snow cover.
Continuity mistake: After Asher is separated from Quinn he's looking around a room with a flashlight and finds the killer. We can see the killer's eyes but a few shots later there is mesh over the eye holes of the mask. (00:52:15)
Continuity mistake: Constantine is thrown out of a bar and onto the street. The sidewalk is very wide and there is a trashcan by a light pole close to the edge of the sidewalk by the street. In the next shot as Constantine is getting up, the sidewalk is suddenly smaller and the trashcan is right next to the building. (01:08:50)
Factual error: The police officer that shows up does two stupid things in a row that real police would never do. When investigating a kidnapping, he calls in what the car was they were looking for. Which he sees. Instead of calling for back up, or even mentioning to dispatch that he found a car that looks like it, after coming from a murder scene at a gas station and following a map left behind to this spot, he approaches the car alone, without calling for back up, or drawing his weapon. Shortly thereafter, he finds the kidnapped boy inside the car, who tells him the man who took him is in the house. The officer then proceeds to go into the house alone to look for a dangerous kidnapper without waiting for backup, even mentioning to the kid that his partner is on the way. (00:32:00 - 00:33:35)
Revealing mistake: At the beginning of the movie, the protagonists dump the corpse of an agent in the middle of nowhere. The guy is stone cold dead...but you can see the carotid pulse on the right side of his neck, under the fake blood. (00:03:10)
Continuity mistake: After a camera shift while talking to Mr. C, Chris' jersey was pulled down more over his pants (lap), but his hands were pre-occupied playing with the string on his hooded sweatshirt. (00:06:35 - 00:06:58)
Continuity mistake: Mrs. Marsh carries two plates with food to the table and starts to place the plate in her right hand in front of Mr. Marsh, but when the camera shifts, she is placing Jonathan's plate in front of him (and it appears she is doing so with her right hand, not the left hand she was holding Jonathan's in). (00:35:54)