Thing is, as a long-time cyclist, the instant I saw that video, I knew exactly what happened -- Biden was clearly clipped or strapped into his pedals, and simply couldn't remove his foot for some reason. It's happened to me on occasion, and it's embarrassing, but it's a risk you take if you use cleats or straps. And if you pop over to YouTube for a clearer view and take a screenshot of that very incident, well:
not only can you see clearly Biden's toe straps, but the caption even states that Biden got his foot caught. But leave it to an alleged medical doctor to mock an 80-year-old falling off a bike onto the asphalt.
Dr. Oz needs to fuck off and go die in a ditch on fire. That's what sort of human garbage he is.