Revealing mistake: When Arnie jumps from the plane, notice the stunt double. He weighs about half of what Arnie would, and has no muscles. (00:55:10)
Revealing mistake: When Arnold is in the plane and throws his belt buckle-knife at the traitor. The next shot shows that it bounces off and continues to spin. Pretty obvious that it's held up by a wire. (00:53:10)
Revealing mistake: At the end right before the van blows up, we see John and the girl get in to it - if you look very closely, John disappears at the exact second the door closes. (01:46:20)
Revealing mistake: During the NYC Zoo fight where the giant crocodiles come out for action, when the crocodiles devour the first bad guy he is very obviously CGI. His head is twice as big as his body, looking really ridiculous.
Revealing mistake: When Lee is watching out her window as she pulls her curtains aside you can see there are some blinds in the window. When it cuts to her looking out the window you can see there are different curtains this time and the blinds are gone. (00:25:10)
Revealing mistake: When Kruger's hand is nailed to the fridge, as he begins pulling his hand loose, you can see it's a fake rubber hand. The fingers wobble in an unnatural way. (00:28:55)
Revealing mistake: When Cullen is in her office wearing the hidden camera disguised as an amulet, we see her from the hidden camera point of view while she is looking in the mirror. You can see she is moving a bit however the view from the hidden camera is perfectly still. It should wobble a bit as well, not standing still. (00:13:20)
