The Pyro laugh comes from Valve's Team Fortress 2, where Pyro is one of the game's most recognizable classes. Because the character speaks through a mask, the laugh has a distorted quality that stands out in short edits and soundboards. It became a familiar reaction sound in gaming communities, especially in TF2 clips, meme compilations, and chaotic montage edits. Its staying power comes from how easily it can read as either playful or disturbing, depending on what visual it follows.