Overall, the violence is pretty mild for the R-rating, which is reasonable since the film's main focus is suspense, terror and tension and as it is set inside a coffin. Blood is mild.
A man holds a knife to his hand and pushes down (his screams are muffled by a rag he put in his mouth), he draws back his hand, covered in blood, and we see a severed finger laying on the sand; he then wraps his hand in a bandage which becomes soaked in blood.
A woman is recorded being shot in the face on a very grainy, unclear cellphone footage.
A man, his face is bloodied and is lying in a coffin, holds a knife to his throat, presses it against his flesh and pulls it away moments later.
A man, blood on his face and neck and a bleeding cut on his forehead mixed with dirt, is seen in a coffin, with his mouth gagged and hands tied together; he struggles and pants as he tries to free himself from the restraints and tries to kick the roof of the coffin but accidentally hits his head on the ceiling of the coffin and shouts in pain.
A man is seen, face bloodied, in a coffin that shakes as two explosions are heard above him; the man shouts and we see sand pouring in the cracks of the coffin (we hear that the bombs were dropped by the military and that they leveled more than half of a city).
There is a tense scene with a snake in a coffin, involving fire.
A man, seen with his face bloodied and covered in mud, is seen in a coffin and we hear his telephone conversation with another man; they shout at each other and the man on the phone says the man in the coffin has to provide money for ransom or he will allow him to die.
Two men have an angry phone conversation, and one of the men is seen, face bloodied, struggling in a coffin as sand covers him.
A man threatens to kill or injure another man's wife and child.
A man tells another man to record himself cutting off his finger and send it to him.
A man says that he witnessed eight people being killed, and he thinks the man he is talking to is willing to let him be killed as well.
We hear that a convoy of trucks was attacked as they drove through Iraq; the group was first attacked by a group of boys throwing stones at the trucks and when the drivers got out, one of the trucks was blown up and six drivers were killed by men with guns, who appeared from behind houses and opened fire.
We hear that a coffin containing the body of a dead young man is found.
A man asks another man why a woman was allowed to be killed and the man explains that they did not know she had been taken hostage.
A man sees a grainy cell phone photo of a woman with a gun held to her head