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.
You can't make this shit up. Democrat Pelosi: "There are healthcare professionals who think that Trump has dementia, that his thoughts do not go together. He doesn't even know the truth. Biden has the stamina. He's right there!"