yashuo's ult after thresh's hook

I think Yasuo can ult every displacement.

Cause you are being slightly, I mean ever so slightly, displaced off the ground so yas can just spam R and ult you.

Because Thresh pulls you (think like Blitz, but only pulls you twice very slowly). Any sort of displacement makes Yasuo able to Ult.

Is it his actual hook? Or is it his Flay? His actual hook should not trigger a Yasuo's ability to ulti. His Flay does.

Think of it like if you have a rope around your waist and you are running.... then someone yanks hard on the rope. You leave the ground because momentum forces you to. Same can be said about if you are standing when it is yanked.... your body is in a state of rest. Force will act upon your waist first before the rest of you.

I suppose that means it should work on Thresh's Q (hook) as well..... but i have never seen a Yasuo ulti on it so idk.

thresh's hook actually contain a knock up. The moment you get hit, it's a stun, then follows a knock up that has such a short duration, seeing the "airborn" appear after the stun is nearly impossible and the comes thh part when he pulls you a little what I think is a knock back like poppy*s charge.