I stand to be corrected on this, but I believe this 'back flip' is credited to an old mate of mine Ray Turner (AAC).
I heard it was down to Graham Waddington - not that I would wish to steal anything from Ray, who's done very well for a former 'rag-and-shag' bloke.
Another mate, John Carr, offerred to take me along for a demo during my Lynx course. It was veto'd by the grown-ups, although I'm not sure if they were trying to protect me or prevent me from getting ideas above my station.
Personally, I think it's a very impressive move.