Alt-text: "If this were a video game, panels 2 to 4 would be accompanied by the trademark missing ambient sound and loud beeping noise to indicate the stun effect."
I'm not entirely happy with the effects in the last panel - I hope it's clear enough what Kat is doing there ...
... and if not, she's basically smoking the whole area up to obscure vision and give everyone some room to escape the killbox they were in at that point. Actually pretty quick thinking, you have to give her that.