From how they melt and burn and buzz in an angry fashion before being turned to plasma goop, they do not react well! And neither does the wall. Or the bear-plant-beast thing behind it. Lots of things die.

... Something moves to shield the floor. It is shielded very thoroughly, though sustained fire could likely break it.

Kuvair is still killing the poison, prioritizing Jinx because she's the one killing things, but he grits out, "The prisoners are under the floor, 'far as I can tell."