Riven E Q over Azir wall, intended?

Happened in my friend's game. According to him, Riven can E then 3rd Q over the Azir wall. I don't suppose this is right mechanically? It's not like the hop cannot be interrupted.

Here's the match history:http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2157842541/227603810?tab=overview And here's the replay: http://www.replay.gg/ajax/replay_batch/2157842541/na