Place this clip right after the line that starts the argument, while the frame still shows the whole group reacting. Follow it with a DJ airhorn to close the bit, or put it before a reaction pause so the next speaker gets the last word.
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The clip is a short crowd chant of voices shouting "rabble rabble" over and over for about two and a half seconds, with no single speaker standing out. It feels restless and comically outraged, like a protest that is more noise than argument. It comes from South Park, in the scene with the Founding Fathers discussing war.