Scion ult movement

So last game, I had a Scion move freely while he was ulting, I mean by that that he could turn 180 or 360 degrees easily which mades him pretty much an AOE VI ult because he could choose his targets. I have no idea how to reproduce it, or if it's a common thing, but here is the game if it can help : http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1725814791/201276130?tab=overview