that background has appeared a number of times
recently on here (recently being a couple of months)
( Professor Fnord Regius Professor of B3ta Chronology, Sun 2 Feb 2003, 20:28, archived)

aha...
well it was the best (quickest) i could find under "dark alley" on google images
(nevermind, Sun 2 Feb 2003, 20:32, archived)