You can. Just that you need to do it really fast.
Also, how come Sombra doesn’t get credit when she cancels an ult?
Once Sigma casts the “Gravity” effect, why would the death of Sigma stop gravity?
It only makes sense that once the person that has harnessed the harness suddenly lets go of the harness, the harness will go full force in the path of least resistance.
You dont need source to realize that. If you are slept by Ana your animation still play and your ult still does what it was going to do while you are sleeping.
source saying its unintended. if you sleep a ana does nano stop working? or if you sleep a ashe does bob stop working? if you sleep a sombra does emp stop working? to stop their’s and sigma’s ult you need to stun them in the activation period, its not a bug that it doesn’t stop after the activation period.
I did make a mistake there with Genji, sorry. Your answer does make it seem like everything I said is wrong however, which is not.
Hanzo and Mei can be killed during the activation and their ults will be cancelled, while Sigma’s will still go off. The only time you can cancel Sigma’s ult is when he’s targeting it. His activation period is between lifting people off and dropping them down. Which you cannot cancel for some reason.