A professional strongman appeared before an audience and offered anyone in the audience an opportunity to hit him in the head with a sledgehammer.
A good sized fellow steps up and is about to swing when he hesitates. "Man, are you sure about this? I could kill you with this sledgehammer."
The strongman says, "go right ahead, it won't hurt a bit."
So the audience member swings the sledge as hard as he can and hits the strongman right in the middle of the forehead.
Five years later, the strongman wakes up from his coma, jumps out of the hospital bed and shouts "Ta-daaaa!!"
