Originally Posted by jlaw

My guess is that he is a police officer - jacked-up middle-aged body style, oversized sense of outrage/enritlement, unironic mirror sunglasses, comfortable using his hands and his bike to subdue others.

Many older police will ride bikes to maintain aerobic fitness rather than run (old knees).

The incident location was likely in his jurisdiction or not far away. He's comfortable acting in this manner in this location with impunity....because he knows who'll show up if the police are called.

Just my educated guess.