Team Fortress 2 is a class-based shooter released by Valve in 2007, and the Scout is its fast-talking runner from Boston. His spy warning is one of many automatic voice responses triggered when a disguised Spy is near, meant to alert teammates before a backstab. The line spread through TF2 gameplay clips, machinima and later meme edits, often paired with other gaming callouts like enemy spotted. It remains popular because the delivery is so frantic that it works even for viewers who have never played the game.