Yeah, I've heard that one. It 'happened' to a pastor of one of my friends some fifteen years ago, almost exactly the same way, only there was more than one assailant. Same punchline though, almost word for word.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'