“Right behind you” is widely recognized from Team Fortress 2 and especially from Valve’s animated short Meet the Spy, released in 2009. The line became a long-running gaming meme because it neatly fits stealth, betrayal and sudden-reveal edits. It spread through YouTube montages, TF2 meme compilations and short-form video posts, where creators use it as an audio cue for an enemy entering frame or a punchline landing a second too late.