Team Fortress 2 is Valve's class based shooter released in 2007, and the Engineer is one of its nine playable classes. In matches, the Spy can attach a sapper that disables and drains an Engineer's buildings, prompting this automatic voice response so teammates hear the threat. Clips of the line later spread through gaming forums, YouTube edits and soundboards, where players began using it outside matches for any act of sabotage. Its long life in memes reflects how central Engineer versus Spy fights remain in TF2 culture.