When the policeman is shot, and claims that Ed made a "nice shot", he's got blood on his face. But when he falls over on the floor, the blood is gone.
When Ed gets his arm shot off, he is wearing a yellow earplug in his ear.
Shadow of the camera can be seen on the wall when Edward is being brought into the ward.
The movie takes its place in USA. But you can see the text "Sjuktransport" at the back of the ambulance when Ed is taken to the hospital.
When Edward is being taken down the hospital corridor into the ward, it can be see sticking out of the top of the doorway.