Team Fortress 2 is Valve's class-based shooter released in 2007, and the Scout is its fast, loud-mouthed runner from Boston, voiced by Nathan Vetterlein. His short taunts and laughs were ripped from the game and shared on soundboards, where clips like this one spread alongside other shooter voice lines such as Enemy Spotted. The 'ha yeah' delivery sums up the character in one second: confident, annoying and funny. That brevity helped it survive beyond TF2 edits into general gaming memes, reaction videos and stream sound alerts where a quick cocky laugh is needed.