Without his teleprompter, Biden can't complete sentences jumping between lies & thoughts, makes long pauses and diluting his incoherent mumbling with "not a joke," etc. Doctor Jill is trying to direct him.
Biden delivers incoherent remarks: "Schumer leader and I, we took action bringing prices down for everyone... Not a joke, by the way... that's not hyperbole, that's literal... My wife Jill cares a lot about this..."