Revealing mistake: Just after Ricky has killed the bald inmate, he then goes to punch the assistant warden in his face, resulting in his one real eye falling out. In the close-up shot of the assistant warden getting punched, a fake prop dummy can be seen instead of the real assistant warden, most likely used so that it would be easier to create the practical effect of his eye falling out. (01:19:22)
Revealing mistake: When one of the inmates goes to cut off the assistant warden's right arm with an axe, the moment before his arm gets chopped off, we can see that it has been replaced with a fake dummy arm. (01:20:24)
Revealing mistake: When the warden has finished shoving the inmate's arm into the meat grinder, there is a shot of the warden pulling the inmate away from the grinder and showing him the tray of meat made from his arm. In the shot, we can see that the inmate's face has been covered in white powder to make him appear as if his face has gone pale due to the blood loss, but it makes his face look completely unnatural, and not at all how a human face would ever appear in a situation like that. (01:22:09)
Revealing mistake: Just after the warden has shot the assistant warden with the bullet made for shooting elephants, there is a shot of the assistant warden's body inflating. In the shot, we can see that really bad prosthetics have been added to his forehead, cheeks, nose and chin to make it appear as if his head is inflating. It is extremely noticeable where the prosthetics end and where his real face begins, making the whole effect appear completely unnatural. (01:23:12)
Revealing mistake: When the assistant warden explodes after his body starts inflating due to the warden shooting him with the elephant bullets, in the close-up shot of his head exploding, we can see that his head has been replaced with a fake dummy head. (01:23:18)
Revealing mistake: When White God fires a needle through the wall of the kitchen, Ricky grabs onto it and is dragged towards the kitchen wall. Just before he crashes into the kitchen wall, a large outline can be seen in the wall, revealing where the effects team made a hole in the wall and plastered over it before filming. (01:23:38)
Revealing mistake: When the warden shoots White God, the close-up shot of his face before he explodes reveals that the actor has been replaced with a dummy. (01:25:55)
Revealing mistake: When Ricky jumps over the table after the warden pushes it at him, there is a shot of Ricky kicking the warden with his foot whilst in mid-air. In this shot, we can see that Ricky's trousers are being pulled upwards, revealing that there is a wire attached to his trousers that is pulling him into the air. (01:26:30)
Revealing mistake: When Ricky attempts to fight the muscular warden, he punches the warden in the stomach and the warden then punches him into a support column. Just before Ricky crashes into the column, a wire can be seen attached to him, pulling him backwards towards the column. (01:27:20)
Revealing mistake: Just after the warden throws Ricky to the ground, when he finishes saying "Your strength doesn't even come close to mine", he starts doing an evil laugh and here, we can see the actor's real tongue and teeth behind the fake prosthetic suit that he is wearing. (01:28:02)
Revealing mistake: When Ricky throws the warden into the meat grinder, in the shot where the warden is being thrown across the kitchen, a wire can be seen attached to him, hoisting him across the room. (01:28:37)
Revealing mistake: When Ricky punches the prison wall, the wall can be seen beginning to break apart a second before Ricky's fist hits it. (01:29:59)
Revealing mistake: In the shot where Ricky punches the prison wall, a split-second before Ricky punches it, a faint outline can be seen to the right of him that gets blasted out of the wall a second later, revealing where the wall was filled in with fake debris and later plastered over. (01:29:59)
Revealing mistake: When the prison wall begins to break apart after Ricky punches it, in the wide shot where the debris from the punch is shown falling to the ground, multiple wires can be seen pulling the chunks of debris from the wall. (01:30:04)
