God's mailman
In series 2, episode 2 of The Ricky Gervais Show TV Show, when Karl was asked a riddle by Ricky, he gave a weird reply.
The Riddle
If there are 2 guards guarding 2 doors and the guards look exactly the same, but one's guarding heaven and one's guarding hell (the one guarding heaven always tells the truth and the one guarding hell always lies) if you've got one question, what do you ask them?
The answer
You ask one what the other one is guarding and whatever they say is behind there door
Karl's answer
"I've got some post here for God so which one of you is guarding heaven?