The Gaster vanish noise is commonly shared in Undertale and Undertale fan-content circles as a sound for sudden disappearance or glitchy transitions. It is tied to the mysterious character W. D. Gaster, whose fragmented, hidden presence made glitch-like audio cues especially popular in edits and meme clips. Even outside strict lore discussions, creators keep using it because the effect is short, recognizable to fans, and instantly communicates that something strange just slipped out of view.