This sound is associated with Crab Game, the multiplayer party game released in 2021 that parodies survival challenges popularized by Squid Game. The Red Light, Green Light round quickly became one of the most clipped parts of the game, so its warning cue spread into short edits, livestream highlights, and meme compilations. People still use it because the reference is immediate for many gamers, and the stop-now feeling works well even outside gameplay whenever a video needs a sudden rule-check or caught-in-the-act moment.