Pyro is one of the nine playable classes in Valve's Team Fortress 2, first released in 2007, and is instantly recognisable by the gas mask that muffles every voice line. In game, players trigger short voice commands for actions like agreement, thanks and taunts, and Pyro's cheerful yes became a favourite because it sounds both eager and slightly menacing. Clips of it spread through gameplay videos, montages and soundboards, where it now works as a compact reaction for agreement, hype and absurd decisions.