Garry's Mod began as a Half-Life 2 modification and received a standalone release in 2006. Its open-ended Source engine sandbox became known for physics experiments, character posing, machinima, and unpredictable ragdoll behavior. Impact noises associated with those collapsing models became recognizable through gameplay videos and comedic animations. Creators continue using these sounds outside the game because they instantly evoke unstable physics and exaggerated digital slapstick. The sequence is especially effective when visual movement includes several impacts rather than one clean fall.