Other mistake: The sword champion is murdered in a dark room. Cut to Tarek Richards by his corpse. The room is still shrouded in darkness, which makes for a cool transition. However, when the camera pans out and someone (with an audible click) turns on the lights, you realise that the room is full of cops which up to that moment have been working in a dark room for no reason - and they have been doing things that require reading and writing, like collecting witness statements.
Other mistake: There are several moments while using the clown dummy toy that make it very obvious it is an actor in a suit. Most obvious of which is that it somehow 'senses' things like the momentum and orientation of the person controlling it, when all it is shown to do is copy muscle movements/motor skills. There are far too many examples to list.
Other mistake: David's wife is looking inside the microscope at what she describes as a protein found in the saliva. It does not quite look like a protein, and in fact it's a reused (it's exactly the same) microscope image from the previous movie, where Marisa identified it as" a section of the pituitary glans of a Lhasa Apso." (00:12:00 - 00:51:25)
Other mistake: When Tobey's unmasked in front of Maggie he's badly burned. Yet his hands appear to be perfectly okay contradicting his claim of losing most of the flesh on his body. Surely they'd be scarred up too.
Other mistake: Despite Lena's cab driver and his wife both being Armenian, the wife's speaking Spanish.
Other mistake: As Peter stands on top of the rocks, you can see a distinct difference between his appearance and Never-land. Also, as the camera pulls back to follow his progress through the Lost Boys area, a vine is seen shaking on the left side because the camera hit it.
Other mistake: When Topper speaks to Ramada for the first time, we can see his name plate read "LT Sean Harley", whereas LT stands for Lieutenant, any army's lowest officer rank. The rank insignia on his collar, though, is that of a Captain (CPT). (00:19:19 - 00:20:09)
Suggested correction: Topper's not in the army, he's in the navy. He has the correct insignia for a naval lieutenant.
Other mistake: When the FBI agent says "Maybe it's time to get a real job" his partner can be seen mouthing the same words.
Other mistake: Just after the warden tells the guard to limit the amount of food the inmates get in their meals, one of the inmates shown polishing the meat grinder says "You eat like a lousy king. Even your dog gets a big steak." When he says "your dog", the subtitles read "yourdog" instead of "your dog." It has been incorrectly spelt as one word, with no space shown in between the two words. (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). (01:21:53)
Other mistake: When the second group of people brought before the judge are sentenced, they are put to death in Mr. Bone Stripper. Curious note: though it kills the people, and chucks their remains out the end, there is absolutely no evidence of the clothing that was on their bodies. There is no pile of shredded cloth anywhere to be seen in the salvage yard.
Other mistake: When Moss confronts the party crasher who has a gun to the arms dealer's head. The party crasher then pours gasoline all over the pumps and Moss shouts "Don't shoot, you'll blow this place up, I'm standing in the shit". As the scene eventually cuts back to Moss on a long shot, you can see that the floor is dry and he's not actually stood in the gasoline. (01:20:00 - 01:21:00)