An atheist professor was teaching a college class and he told the class that he was going to prove that there is no God.
He said, "God, if you are real, then I want you to knock me off this platform. I'll give you 15 minutes!"
Ten minutes went by.
The professor kept taunting God, saying, "Here I am, God. I'm still waiting."
He got down to the last couple of minutes and a Marine just released from active duty, and newly registered in the class, walked up to the professor, hit him full force in the face, and sent him flying from his platform.
The professor struggled up, obviously shaken and yelled, "What's the matter with you? Why did you do that?"
The Marine replied, "God was busy, so He sent me."