This one's a bit longer, and I say it with sincerety .
Pope is in his popemobile, going to a cathedral. The driver is getting tired. "Sir, could you take the wheel for a bit? I need to rest."
"Sure thing!"
So now the pope is driving.
He arrives at the gate and one of the church officials says to another, "sir we better not keep them waiting long".
"Why's that? Who's here?"
"Well, it's probably God, because the pope is driving!"