Cho'Gaths Feast and walking through Azir ult?

Played against a Riven...won lane hard. After a fight between the two of us, I got her low enough to use Feast on her. It did over 400 damage and she had less then needed to kill her.

She did not shield. I went in, popper her up, then pressed feast. My animation went off and the sexy gentleman cho skin did his awesome nom nom nom. As the animation and sound went off, Riven flashed to try to get out. My Feast was on CD....Riven was still alive.

I did happen to get this on video if I do need to show it.

Also played against an Azir and there was one time I completely was able to walk through his ult without even being pushed back. Fine by me but I'm sure it was upsetting for the Azir player lol