Most of the violence is off-screen and imagined. A man burns another man with an oxyacetylene torch, burning his face and body. The torch is shown but the actual burning is not. Neither is the victim shown afterwards.
A man lights an oxyacetylene torch to burn another man and plans to blow up the tanks to destroy bodies. Again, the torch is shown but the action is not shown nor is the aftermath.
A man falls from a high place to his death. He screams and is seen falling. The next shot cuts to him lying dead. Some blood is seen on his head.