http://www.abc.net.au/news/newsitems/200407/s1163483.htm
This is excellent: a United LA–Sydney flight returned to LA after “B-O-B,” used by air crews as a code to signal the best looker on board, was found written on an air-sick bag and interpreted as meaning “bomb on board”! (The main story addresses the problem of how much information should be disclosed to passengers while the aircraft is in flight.)