Probably the laugh track from the Jeffrey Toobin Zoom session.
The one where Toobin was "dealing with a personal issue" on a live PC camera.
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BREAKING: Joe Biden called a lid at 11:27am today, amid new revelations about his family's Ukrainian energy dealings and one day after his drive-in speech in PA was filled with Trump supporters— Jack Posobiec 🇺🇸 (@JackPosobiec) October 25, 2020