The guy, Biden, is obviously feeble and is definitely well past the age he should have retired.
(as is over half of government functionaries in D.C.)
They never retire until their deaths can no longer be covered up by the media.
But with Biden it seems half physical frailty and half psychological.
That is, once he fell multiple times, now it is constantly on his mind.
He is trying so hard not to fall and wants so badly to go up the stairs quickly with pep and agility, that he fails by over concentration on it. His gait is not natural and relaxed. He seems rigid and trepidatious, which one would expect from an 80 year old person, concentrating intensely on every step. I don't know who he thinks he is 'fooling'?
Before long his controllers will no longer allow him to be filmed trying to ascend stairs. It is too painful to watch. We will see a shot of him starting up, cut the shot, and then he is suddenly at the top doing his stupid boy scout salute to nobody. Not sure how they could pull this off, but no doubt they will try soon to rigidly control what the press can and cannot record.