By his description, he was upside down and gave it up to half loop "out of inverted".
His plane would be rightside up at the bottom of that inside loop.
It would be pulling max Gs and probably had full elevator deflection. Ripe for a stall. As ripe as it's gonna get.
And when it stalled and spun, he gave it up to get out of it.
His wing was stalled and he pulled up.
Chevy43, Is this called a spin? Does up elevator make it worse?
yes
yes