This sound is associated with the 1951 Donald Duck cartoon Out of Scale, where its light string-pluck timing fits classic animated misdirection. Although the audio itself is just a tiny musical sting, it became useful online because it cleanly marks a fake shoulder tap or a sudden look-behind moment. Creators still use it in short memes, GIF-style edits and prank videos because the two-note doink reads instantly, even without context, and carries the same fast, old-school cartoon energy that makes simple visual jokes land.