Garry's Mod is a physics sandbox game built on Valve's Source engine, where players spawn props, build contraptions and stage chaotic multiplayer scenes, and its player death sound became a familiar audio cue in that community. It spread through YouTube gameplay videos, machinimas and meme edits, where the limp collapse was reused as shorthand for a sudden defeat. Like the Roblox oof, it works because players recognise it instantly, and it remains popular in Gmod montages and short-form edits that lean on nostalgic Source-engine humour.