The sound comes from the Fairchild Republic A-10 Thunderbolt II, nicknamed the Warthog, a close air support aircraft built around its powerful GAU-8 Avenger cannon. Footage of the cannon firing spread widely online, and the low buzzing noise earned the onomatopoeic nickname brrt among military fans and gamers. It later became a meme sound, detached from its original combat context and reused to exaggerate firepower in videos, streams and edits. It remains popular because the noise is so distinctive that a few seconds alone can suggest an entire airstrike.