Place it after the invented claim is shown on screen, so it answers the nonsense directly, then follow it with the Illuminati Confirmed sound to sell the fake logic. For a bigger reaction, open with the Shocked Meme Sound Effect before the claim appears.
关于此声音
This 16-second clip features Patrick Star explaining the invented word wumbo to SpongeBob, repeating I wumbo and you wumbo as if it were grammar. It feels silly and warm, with the joke coming from how certain he sounds about something he just made up. It comes from SpongeBob SquarePants, in the 2002 episode Mermaid Man and Barnacle Boy IV, where Patrick wants a shrinking belt set to W for wumbo.