I remember leaving RAF Changi along with two coachloads of PROPER ( ie Naval) airmen in 1968 ; as we drove past the Guardroom, someone played "The Camptown Races " on the trumpet whilst we all sang "All You Crabfats Piss Me Off , Doo-Dah,Doo-Dah" ( good-naturedly, of course !! ),whilst a stony-faced SWO & staff looked resignedly on.I imagine he / they got their revenge the next time a Carrier Air Group disembarked to that lovely place, though.