According to u/chiffed “Wide patterns suck a lot of heat out of a fire, but notice they got really low? Superheated steam. Steam also suffocates fire, but can go through bunker gear and cook you. Science and training make firefighting survivable.”
I imagine he’s pulling to help him get low and get a good angle since it is difficult to do on their own in heavy gear with a hose in hand
Latest Answers