The exact origin of this recording is unclear, but the stretched boo vocalisation has circulated on soundboards as a short reaction clip. Booing has long been used both as a crowd sound of disapproval and as a playful ghost noise, and this version plays on both meanings. Shared as a quick download for edits, it appears in meme videos, Halloween posts and prank compilations where creators need an instantly readable scare or rejection sound that works without any visual context.