http://www.voidspace.org.uk/cyberpunk/pratchett_characters.shtml#lugg"In the case of the Luggage, built to serve as self-propelled travel accessory and bodyguard, one of the set of characteristics known as "life" is a particular characteristic known as "faithfulness" and another is one known as "murderous intent". When it opens its lid - often in order to snap it hard on something it considers to be threatening its owner - the luggage may reveal clean laundry, or a king's ransom in gold. As often as not, though, it displays teeth like bleached beechwood and a tongue as large as a palm leaf and red as mahogany"