On Monday Biden has a particularly "bad day" during a press conference he has before his interview. He looks and sounds like death. He starts incoherently mumble-answering with the very first question. It's the most agonizing five minutes of political theater ever. Aides clearly signal they are ready to jump in and save him but the old, pridely fuck won't have it. The Q&A is better than the best scene in any horror movie. He just digs himself deeper and deeper and deeper into a hole.
He knows he's killing his campaign. He feels an uncontrollable urge to escape but his old brain isn't working. He needs to escape! Suddenly instinct takes over. In a loud, scared voice he says "I gotta potty," and with truly surprising speed he twists his upper body around to run away but his tired old skinny, hairy legs remain far too slow he takes about two sickening off-kilter steps. And then he falls over like an old, dead, broken tree pushed over by the winds of a hurricane.
His equilibrium is non-existent and one of his legs goes rigid and his hands don't break his fall. His spine freezes up and there's a sickening "CRACK!" even before he falls over. The back of his head goes directly into the floor and after that smash it bounces once for good measure. Not only did he KO himself - he broke his hip too. Some Reddit sleuths are adamant that the "CRACK!" was a bone in his pelvis breaking that led to his broken hip when he fell. In any case #CRACK starts tending minutes after the fall.
Bonus drama. Trump is in a rage every single day because he isn't the story any more. He rants "Tired Joe Biden fell over all by himself. I got shot!" to no avail.