In Team Fortress 2, released by Valve in 2007, the Spy can attach a sapper to an Engineer’s buildings, including the sentry gun, draining its health until it is destroyed or removed. The buzzing sapper effect became a familiar audio cue for players, signalling that a friendly defence was under stealth attack. Outside matches, the clip spread through TF2 edits, reaction videos and meme compilations, where its instantly recognisable crackle now stands for sabotage, betrayal and quiet chaos even for viewers who have never played the game.