That is pretty funny on a number of levels...
1. Do you need to have the giant playing cards with you to pull off the shot?
2. Is that Jesper Parnevik?
3. I know he said to hide the ball in your pocket, but isnt your friend going to be on to the trick when you place another ball behind the first ball, carve a small sand tunnel behind the second ball and motion for your friend to move out of the way because the second ball is going to rocket through their skull?
4. Will your friend have to be intoxicate to not notice the other ball flying out of the bunker?