The Tool Gun is one of the signature utility items in Garry's Mod, the sandbox game built on Valve's Source engine. Its firing sound became familiar through machinima, sandbox building videos and chaotic multiplayer clips shared online for years. Even outside full GMod videos, editors use the zap as shorthand for creating, fixing or changing an object in a scene. It stays popular because the sound is short, instantly readable to PC gaming audiences and closely tied to the creative, modded feel of Garry's Mod.