A person checks into a hotel for the first time in his life, and goes up to his room. Five minutes later he calls the desk and say, Youve given me a room with no exit. How do I leave?The desk clerk says, Sir, thats absurd. Have you looked for the door?The person says, Well, theres one door that leads to the bathroom. Theres a second door that goes into the closet. And theres a door I havent tried, but it has a do not disturb sign on it.