Traitor Gimmix 101

[Roomba]

A fun and simple foam to use on a crowd is unstable mutagen/fluorosulfuric acid, with some glowing slurry thrown in if you can spare the time and effort. The victims become incredibly irradiated and mutated, with a high chance of becoming obese and dropping all their stuff, which promptly dissolves in the acid. Mostly survivable, but great for messing people up.