Revealing mistake: When Dimitri pushes Jen to the ground after she tries to shoot him, in the shot after she lands on the ground, a pair of trousers can be seen on her legs. Jen is not supposed to be wearing trousers in this scene, so these are presumably protective trousers used for the stunt. (00:44:35)
Revealing mistake: When Jen gets out of the lake after Dimitri drives past in the four-wheeler, in the shot of her crawling onto the sand, there are markings on the ground that imply someone had already crawled there, presumably from previous takes. (00:43:05)
Revealing mistake: When Richard, Stan, and Dimitri are driving through the desert to follow Jen through the blood trail she left behind, tyre marks can be seen on the sand, presumably from previous takes. (00:38:50)
Revealing mistake: There is a shot of Jen approaching the SUV with the shotgun raised to her face and looking through the eyepiece that is repeated a second time around a minute later, and a third time around thirty seconds after that, shown whilst she is approaching Stan after walking past the SUV. This is evident by the fact that the background, the position of the shotgun and her facial expression are exactly the same each time. (01:17:10 - 01:18:10)
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)
Revealing mistake: When Richard punches Stan, a blood splatter comes from his nose. He falls back and blood is over his face and his hands. Just after he is first punched, his hands are already covered in blood as he is falling back, before he touches his face. The blood was most likely applied to his hands separately before filming the scene as it was never visible on his hands at any point earlier on. (01:03:35)
Revealing mistake: When Richard and Stan are driving across the desert, there is a shot of Stan driving the SUV. The number plate and Range Rover logo appear to be reversed and the driver seat is shown on the right hand side instead of the left hand side, revealing that the shot has been flipped. (01:04:40)
