The exact origin of this callout is unclear, so it is best treated as a generic tactical voice line rather than a quote from a known game. Short comms-style clips like this circulate widely among gaming communities, where players share callouts, warnings and reaction lines for edits and streams. Its staying power comes from the situation it describes: getting flanked is a universal multiplayer experience, so the line fits battle royale fails, betrayal montages and ambush compilations across many titles.