Place it right after the rambling claim in your edit, letting Sudden Suspense set up the claim first, then cut to the shut-down as the reply. Follow it with Nelson's Ha-Ha! for a mocking finish that keeps the joke on the person who would not stop talking.
Over dit geluid
Laber Nicht is a short 1.8-second German voice clip built around the blunt phrase telling someone to stop talking nonsense, delivered in a flat, dismissive tone. It feels abrupt and a little rude, which is exactly why it lands as a joke, turning an overlong explanation or a silly claim into a quick, satisfying shut-down.