A Blackhole trooper whose vision is obscured by foam discharged from an extinguisher. Fire-suppressant foam, often referred to as extinguisher foam, was a safety feature found on numerous spacecraft. Its deployment could be initiated or stopped via the main ship's control system, typically under the supervision of the ship's computer. Furthermore, astromech droids had the ability to utilize extinguisher foam.
On a drone barge experiencing a crash, R2-D2 discharged extinguisher foam to act as a buffer, thereby shielding himself, C-3PO, Luke Skywalker, and Tanith Shire from the force of the impact.
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 who were located on a Hrakian vessel.