The Compression blast, also known as the air blast or airblast, is the alternate fire for all of the Pyro's primary weapons except the Phlogistinator. It is a blast of cone-shaped gas emitting from the end of the weapon. When the alternate fire button is used, (default key: MOUSE2), the Pyro will use twenty ammunition (fifty ammunition with the Backburner equipped, twenty-five with the Degreaser, five with the Dragon's Fury) to push enemies away several feet. It can also deflect most projectiles and instantly extinguish burning teammates; the latter grants 20 Health to the Pyro upon doing so.