A man checked into a hotel for the first time in his life, and went up to his room.
Five minutes later he called reception and said: "You've given me a room with no way out. How do I leave?"
The desk clerk said, "Sir, that's impossible. Have you looked for the door?"
The man said, "Well, there's one door that leads to the bathroom. There's a second door that goes into the wardrobe. And there is another door, but I haven't tried it, it has a 'Do Not Disturb' sign on it."