The audio is the opening of Also Sprach Zarathustra, a classical piece by Richard Strauss that became widely associated with 2001: A Space Odyssey after its memorable use in the 1968 film. Online, short cuts of that famous fanfare spread as a reaction sound for mock glory, exaggerated success and ironic genius moments. The phrase “you won the internets” comes from early web slang, so pairing it with this massive orchestral cue made the joke feel even bigger. It still works because the contrast is instantly clear.