Billy Joel's The Stranger - pilot piano air

http://www.youtube.com/watch?v=jI2BnzF1860 Wiki says Joel wrote the tune himself, but all for every reason I've always thought I'd heard it somewhere other before. A person else think so? If so, where's it from?

Source: http://boards.straightdope.com/sdmb/showthread.php?t=638333&goto=newpost