Fiora and Yasuo ulting eachother

ok so i got caught out by a Braum and Fiora i threw my whirlwind and i knocked them up but i think Fiora got her ult off before i knocked her up so I ulted Braum only so me and Fiora are both in the air ulting which was really cool looking thumbs up to the Rito animation guys :D

this was a weird scenario so I have some questions

can Fiora ult well knocked up or did she get it off before my whirlwind

also is Yasuo targetable during his ult... im assuming so sense after my ult i was nearly dead and i had Braum suspended so only Fiora could have done the damage.

side thing: it would be cool if Yasuo could ult an ulting Fiora since she is in the air during it... just think of that amazingness Fiora and Yasuo flying through the air in an epic clash of steel... but i guess you cant do that because Yasuo's ult prevents enemies from attacking so it will cancel Fioras ult but it would still be cool