Did you hear the one about the atheist and the preacher?

Atheist: "Do you honestly believe that Jonah spent three days and three nights in the belly of a huge fish?"
Preacher: "I don't know, sir, but when I get to heaven, I'll ask him."
Atheist: "But suppose he isn't in heaven?"
Preacher: "Then you ask him."

Found this at a site called swapmeetdave.com