As recounted to me many moons ago:
Early 80's at a little petrol station only minutes from a busy Wilts transport hub, Army officer of indiscriminate rank, is filling his little sports car, SAC biker comes out of shop having paid for his petrol.
Army: Airman!! don't you salute Army officers in the Air Force
SAC: I don't think we have any Army officers in the Air Force!
He got his helmet on, started his bike and left before brown thing was able to reply