This line comes from Valve's Team Fortress 2, the team-based multiplayer shooter first released in 2007, where distinct character voice lines play during matches, including reactions to being healed by the Medic. Short clips like this one spread through TF2 gameplay videos, compilations and soundboards, where players reused the most quotable reactions outside the game itself. It remains popular because it is instantly recognisable to TF2 fans, easy to drop into a highlight, and captures the game's affectionate, over-the-top team dynamic in just two seconds.