Use a rocket launcher, lean back against a tree, and point the rocket launcher at your feet with your hands. Don't point it vertically. When the hammer fires at you, you will kill yourself. The rocket launcher should move forward a little. Move the steering wheel when you fire, because you have your back to a tree and walk in the same place. Remember, you can also move backwards first. When you are stuck in the wall, your blood will not exceed ten (I always get stuck)