Continuity mistake: Whilst Stan is chasing Jen, after she smashes a flashlight light against a rock, he is holding a rifle with both hands. The camera changes angles to a closer shot of him where his right hand is suddenly swinging freely. (01:20:35)
Other mistake: Jen breaks a flashlight against a rock and the glass lands on the ground beside it. Stan runs up and his bare right foot steps on the glass. However, given the rock besides the glass, tripping could not have been possible because his left foot would have bumped into the rock. (01:20:35)
Continuity mistake: Stan slips on a few pieces of broken glass and lands on the ground in a 12 o'clock position. The shot then cuts to Jen, but when it cuts back to Stan, his body has suddenly rotated closer to a 10 o'clock position. (01:20:45)
Continuity mistake: When Stan is holding onto his foot after slashing it with a shard of glass, there is one shot where his thumb is against the side of his foot, but in a close-up of the foot, his thumb is pressed directly on his foot. (01:21:00)
Other mistake: When Jen shoots Stan in the head whilst he tries to run her over with the SUV, the bullet pierces through his head and through the back of the headrest. There is no bullet hole in the front of the headrest, shown when Jen approaches the SUV, even though there is one in the back. (01:24:30 - 01:25:05)
Continuity mistake: Just after Richard gets off the phone with Roberto, the back of his hair is sticking up. When the shot cuts, his hair is pressed down. This may be hard to see when the camera is in front of him, but it is more noticeable when he stands up and we see the back of his head. (01:30:05 - 01:30:45)
Continuity mistake: When Jen and Richard are shooting at each other, there is a shot from directly behind Jen where she is taking cover behind a chair and pointing the shotgun directly forwards toward Richard. The camera changes angles where the shotgun is pointed towards the right. (01:37:05)
Continuity mistake: When Richard starts chasing Jen through the hallway after realising she noticed his trail of blood, there is a shot where we can see the shotgun wound on the left-hand side of Richard's stomach. A couple seconds later, the wound is now on the right side of his stomach. (01:39:27)
Continuity mistake: When Richard is firing shots at Jen after she tries to shoot him, he is standing in a small hallway and walking backwards. To his right, there is a rectangular shaped design of some sorts on the wall. At the end of the shot, he has walked past it and is standing beside a part of the wall that is bare, but stained with blood. The camera changes angles and he is suddenly standing beside the rectangular shaped pattern again. (01:41:05)
Continuity mistake: Richard begins running down a small hallway, where there are some blood stains shown on the wall. These change appearance when Jen runs down the hallway a few seconds later. (01:41:05)
Audio problem: Richard is standing in a small hallway trying to shoot Jen in the next room. He turns around to run down the hallway and shouts "Fuck", however his teeth are clenched and his lips don't move when he says the line. (01:41:05)
Audio problem: When Richard is running around the house trying to find Jen near the end, he is heard ferociously breathing and grunting. The breaths and grunts appear to have been dubbed in as Richard's facial and chest movements remain mostly still, which wouldn't happen if he was breathing and grunting that heavily. (01:41:10)
Revealing mistake: When Jen and Richard are chasing after each other through the house, some of the shots of them running appear to have been repeated to give the impression that they are running in circles. Specifically, the shots of Jen running through the living room, the shots of Richard running through the hallway and the shots from behind Jen running out of the door in the hallway. (01:41:15)
Continuity mistake: Whilst running through the hallway, Jen slips on some blood and falls over. The shotgun lands on the floor right next to the wall. Two quick cuts after, the shotgun has changed position, moving to a different part of the floor. (01:41:40)
Continuity mistake: When Richard has Jen pinned against a wall, the POV shots of Jen facing Richard show blood running down her field of vision, but in the other shots, there appears to be nothing covering her eyes at all. (01:42:25)
