Revealing mistake: In the beginning of the movie, when the teacher is shot, the impacts on his chest are out of sync with the actual gunfire. First, we see the soldier start shooting, but he fires several shots at point blank range before the bulletholes and blood appear on the teacher. Also, as the angle changes, the teacher falls backwards with more impacts appearing on his chest. The problem is, the soldier has already stopped shooting, and there is no other gunfire to be heard. (00:05:25)
Revealing mistake: When Col. Tanner is on top of the Russian tank, he is firing his pistol into it. After a few shots, you can see that the slide on his gun locks back, showing that the gun is empty. Tanner does not reload, but is none the less able to keep shooting afterwards. (01:11:25)
Revealing mistake: Early in the film, when the boys shoot the deer - there is no actual shot that comes out of the shotgun. He pulls the gun back, simulating a shot, and the Sound FX is perfectly placed, but there is no shot coming out of that gun.
Answer: It was a tracking device which gave away their location. Since they couldn't remove it, they decided to kill him as he was now a liability.
Gavin Jackson
They killed him because he betrayed them.
How was Daryl forced to swallow it? Did they manage to apprehend him and force it down his throat, or was it something else entirely?