In principle possible in the headstand, shoulderstand or handstand.
Still not very advisable, as the balance organ really needs a very long time to achieve a stable balance with the head downwards.
Everyone can estimate the effort themselves … How long did it take to stand a handstand? How much training was needed to balance him freely? And how long was the way to the one-armed?
And now you want to balance a flyer on top of it? Even the one-armed handstand is easy in comparison to that!