When buddy is attacked by the man on the barbed wire fence, he's stabbed in the neck and pulsing out blood, resting at the man's knees/waist. When the others find him he is lying on his back away from the man and is conscious, coughing up blood.
When Sharon says "This isn't you, John." this makes no sense since they just met at the beginning of the story no more than a couple o days ago.
Although they added the sound of a bullet flying and hitting the target (good job) They put the "Bang" from the gun in front of it. You hear the bang after the bullet hits. It travels faster than sound.
The first time Jonah is dumped in the pit, one can clearly see one of the corpses breathing, on the far left of the screen.
Despite there being a pit of human corpses, there are no flies or any other obvious signs of decomposition (such as maggots, rotting flesh, any suggestion of a foul odor, etc).
The small red European car used in the movie has no license plates.