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Five minutes later he calls the desk and say, "You've given me a room with no exit. How do I leave?"
The desk clerk says, "Sir, that's absurd. Have you looked for the door?"
The person says, " Well, there's one door that leads to the bathroom. There's a second door that goes into the closet. And there's a door I haven't tried, but it has a 'do not disturb' sign on it."
*Taken from ArcaMax Publishing.