Continuity mistake: Just after the warden has chopped off the inmate's hand by forcing it into the meat grinder, the inmate falls over and some of the blood coming out of his arm splatters on the wall beside him. Two other inmates walk up to him to help him up, and now there is suddenly much more blood on the wall. The blood also changes appearance, being splattered on the wall in one shot, then being smeared on the wall in the next shot. (01:22:16)
Other mistake: Just after the assistant warden has been carried away by the other inmate, it cuts to the warden in the kitchen with his son and a guard. When the guard tells him the menu for tomorrow is ready, the subtitles "Sir, the prisoner's menu for tomorrow is ready." The apostrophe in "prisoner's" is shown in the wrong place. Saying "prisoner's" implies that it's just for one prisoner, and since the menu is made for all of the prisoners, the subtitles should have read "the prisoners' menu" and not "the prisoner's menu." The guard even says "They'll have some beans, vegetables and meat for lunch" afterwards, so multiple people were being referred to. (This depends on which format and which studio distribution you are watching, but it can definitely be seen on the Region B Blu-Ray distributed by MediumRare). (01:21:15)
Continuity mistake: When the assistant warden starts searching Ricky's cell, he opens the two doors to the toilet stall to see if he is in there. Whilst Ricky jumps down from the ceiling, the assistant warden has the left door on the toilet stall held open and the right door on the toilet stall closed. When he notices Ricky in the next shot, the left door on the toilet stall is now closed and the right door on the toilet stall is now wide open. (01:19:09)
Continuity mistake: When the inmates are cornering the assistant warden, he begins to walk down the stairs in a wide shot, with his left arm lowered. In the next shot, he is suddenly waving his left arm in the air. (01:20:10)
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 Ricky punches Tarzan's jaw, in the shot where Ricky's fist goes through the bottom of Tarzan's jaw and up through his mouth, Tarzan has been replaced with a dummy. (01:02:20)
Continuity mistake: When Ricky retaliates after Tarzan tries to squeeze his head through the jail cell bars, there is some blood shown on his face. A couple seconds later, just after he punches Tarzan's arm, there is drastically much more blood on his face. (01:02:10)
Continuity mistake: When Ricky punches the drug lord in the side of the head, whilst the drug lord begins to fall over after Ricky punches him, there are no visible injuries shown on his head. When the drug lord is shown on the ground in the next shot, there is a huge wound and lots of blood on the side of his head that would have been visible in the previous shot. (01:12:25)
Continuity mistake: Wong Chun stuffs a load of razors in Ricky's mouth and begins hitting him. After the warden asks Ricky a question and Wong Chun stops hitting him for a moment, we can see that Ricky's left cheek looks fine (aside from the blood running down his head). In the next shot, the razors are suddenly sticking out of his cheeks that were not there in the previous shot. (01:16:27)
Revealing mistake: Whilst the cell is filling with cement, Ricky runs over to the steel door and bursts through it to escape. In the shot of him bursting through the door, we can see that the interior of the door is extremely thin and is barely a millimeter deep, revealing that it is a fake prop door and not steel. (00:53:45)
Visible crew/equipment: When the warden's son starts hugging his father's leg after tripping up on the red carpet, the camera pans upwards towards the warden, and he begins to turn his head. When he does this, white reflector screens can be seen reflected in his glasses. (00:57:15)
Continuity mistake: When Ricky stands back up to start fighting with Wong Chun again, a slash wound can be seen on his cheek, positioned beneath his nose. When White God appears to join the fight seconds later, the slash wound on his cheek has now moved up his face to be level with his nose. (00:51:40 - 00:52:13)
Continuity mistake: When the warden's car pulls over at the prison, the car stops where the back right hand side tyre is positioned a foot or two away from the red carpet. In a close-up shot of the warden getting out, the car is suddenly much closer to the red carpet. (00:56:17)
Continuity mistake: When Sa is trying to make music with the leaves, at the end of one shot, his elbows are lowered, but when the camera cuts to an angle behind him, his elbows are suddenly raised. (00:41:04)
Revealing mistake: When the inmates begin to confront the assistant warden after Kuang's death, head of the East Wing, Tarzan appears and smashes an inmate's head with his bare hands. The inmate's head has been replaced with a dummy prop head in the shot where his head gets smashed. (00:39:19)
Revealing mistake: When Wong Chun cuts the skin off Sa's lower face, in the close-up shot of his face getting skinned, it is apparent that Sa has been replaced with a dummy. (00:45:50)
Revealing mistake: When Wong Chun kicks Ricky across the courtyard after he sets the plants on fire, a wire can be seen attached to Ricky's trousers just as he begins to lift off the ground and get hoisted backwards. (00:49:03)
Continuity mistake: When Hai stabs himself, blood is shown across his abdomen, but in the shot where he begins to remove his intestines from his stomach, there is no blood shown on the part of his abdomen around his stomach. (00:37:32)
Continuity mistake: When Hai falls to the ground after Ricky punches him, one of the intestines he used to strangle Ricky with can still be seen in his stomach when he falls over. When he gets up, the intestine in his stomach is no longer there. (00:37:51)
