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No reliable source work, creator or release year is documented for this clip, so its history is tied to its circulation as a soundboard sound under the name 665- Secret 3rd Other Thing. The numbered, deliberately vague title helped it function as a catch-all reaction for moments when a third, unexplained possibility appears. Shared in short edits and meme compilations, it survives because the joke does not depend on a specific reference, only on surprise, curiosity and the feeling that something secret has been added.
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Short clip known as the secret 3rd other thing, used as a mysterious reveal sound for plot twists, hidden options and unexpected third choices in edits.
At just under ten seconds, this clip plays on the idea of a secret third other thing, something that was not one of the two obvious options. The humor comes from the vagueness, because the listener is left to imagine what that hidden choice could be. Creators use that built-in mystery as a punchline, letting the sound suggest a reveal without actually explaining it. It works best when the audience expects a simple either-or answer and gets an absurd, unexplained alternative instead, turning confusion into the joke itself for a moment.
