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 Clown Show: "My name's Joe Biden... homeland security secretary uhuhuhuhuhuhuhuhuhuhhuhuhuh... I took action to secure our border... Not a joke!.." Dr. Jill: "And that's what Joe is doing today for all of us!"