A Blackhole trooper whose vision is obscured by foam from an extinguisher. Fire-suppressant foam, often called extinguisher foam, was a fire control system found on numerous starships. The ship's computer typically monitored it, and activation/deactivation was possible via the main control panel. Astromech droids could also utilize extinguisher foam.
To soften the landing during a drone barge crash, R2-D2 deployed extinguisher foam. This shielded himself, C-3PO, Luke Skywalker, and Tanith Shire from harm.
During 1 ABY, Skywalker, Leia Organa, Paxin, Falud, R2-D2, and C-3PO, a team of Rebels, employed extinguisher foam to incapacitate several Blackhole troopers on a Hrakian vessel.