Any knucks... is there a name for this manouvere?
Yes, it's called 'stupidity'. Or 'showing off'. It is not something which is (or should I say, was) taught.
A pity you've only flown in the JP6 - or 'Hawk' as it's called. You should have tried the A5 pass in Mr Folland's pocket rocket -
that was low level flying!