Team Fortress 2 is Valve's team-based multiplayer shooter, first released in 2007, and the Spy is its stealth class, able to disguise himself as an enemy and strike from behind. Short Spy clips like this one have circulated on soundboards and in gameplay videos for years, where the familiar sneaky music instantly tells viewers that a trick is underway. Because the clip is so short and recognisable, creators keep reusing it as shorthand for infiltration, betrayal, and getting caught in the wrong place.