The PFA's aerobatic flight test schedule includes, loops, rolls off the top, stall turns and positive spins.
Inverted spins and flicks are intermediate competition figures - hardly extreme! Neither are particularly high G: neg one for the spin to commence about 4positive on the pull out. Flicking is about 3 pos or slightly less (in my aeroplane) negative - just very uncomfortable negative!
Inverted spin recovery is (Pitts-centric comment!) more rapid than erect recovery because whilst erect the tailplane blanks a large proportion of the rudder. Inverted it only blanks the lower section of the rudder.