What would seem to be one of the oddest examples of electronica crossover was the Fireman, an ambient project concerning producer and occasional Orb-collaborator Youth plus the dean of British rock, Sir Paul McCartney. In truth however, McCartney had been involved in London's electronic and avant/garde music scene during the mid-'60s -- he even prepared the tape loops and effects for the Beatles' famed "Tomorrow Never Knows," probably the most famous use of musique concrète in history.