A drunk staggered up to the hotel reception desk and demanded his room be changed. ""But sir,"" said the clerk, ""you have the best room in the hotel."" ""I insist on another room!!"" said the drunk. ""Very good, sir. I'll change you from 502 to 555. Would you mind telling me why you don't like 502?"" asked the clerk. ""Well, for one thing,"" said the drunk, ""it's on fire.""