Darth Vader is one of the most recognisable characters from Star Wars, and his drawn-out no has become a widely shared reaction sound online. The clip is short and instantly understood, so creators reuse it whenever a moment calls for exaggerated disappointment or disbelief. Its humour comes from the contrast between a powerful villain and a simple, helpless refusal. Because the sound needs no setup or explanation, it keeps appearing in memes, edits, and reaction videos long after its first online use.