Btw, being serious. Luffy having the sky splitting moment is not an asspull.
He unlocked Adv. Coc and thought that it would be enough to clap Kaido's cheeks. An ability he BARELY learned. He got clapped instead.
He recovers fully with the feast. Something stupid but nothing that haven't happened already ever since pre-TS. Makes sense in One Piece.
He goes back to facing Kaido, now not 1v1, but 3v1. Kaido didn't have time to recover. Kaido's been fighting for quite some time against MULTIPLE enemies. A nerfed Kaido vs a Fully recovered Luffy with a little bit better grasp of his new found ability going on a stale isn't really something out of the ordinary. I think that's quite ok that it was done under these circumstances. Asspull would be if it happened before he got clapped.
But anyway. Back to memeing.