Joel, I don't think this had the impact that you wanted. I think he was suppose to be banging his head against the wall.
When they say "Don't try this at home"
... I wouldn't try this at home ... or anywhere else. Guns are not something to fool around with. You can have good intentions but somebody is more likely to blow off somebody's head. How do you train for something like this? YOU DON'T.
Kungfutrainer, something like this is not something you decide one day to do on a whim. If this is real then it would take decades to train for. If you are serious then you had better talk to your friend's Dad and let him put you in contact with the person who does it. Only he can train you properly and safely. You can't come on to a forum and ask something so ludicrous as some idiot may give you some wrong information when they have no right to that may end up getting you killed. Seek a professional if you are serious about it. If you are serious about it then I highly doubt you would be asking on a forum.
My vote ... lock this thread down before this gets to far gone.