SCP: Secret Laboratory is a multiplayer horror game based on the SCP Foundation, first released in 2017 by Northwood Studios. In matches, the surface is the outdoor area above the facility where escaped players and responding forces often meet and fight. Clips of short player callouts from the game circulate in the SCP SL community on soundboards and in edits, and this warning became a reusable shorthand for calling out surface fights even though the individual speaker and original match are not documented.