In my two days of venturing around CP, I've found that it's pretty much a madhouse. During the weekdays, not a huge amount of traffic, but after work and on weekends, it's damned ridiculous. The runners, walkers, the cyclists going all sorts of speeds (but I doubt too many are able to ride much more than 20+ given the conditions), and tourists not knowing what they are doing....
If he was swerving to avoid other pedestrians (which happens every 50ft), he may not have had much choice.....
Much as this guy looks like the type to just blast through every stop sign around at full speed and ride on the sidewalks and over taxicabs, I'd have to give him some benefit of doubt with regard to riding in Central Park. It's not a bicyclists fault necessarily that so many pedestrians like to ignore the lanes and/or try to cross in front of you thinking it's okay if you have to lock up your brakes. Had that nearly happen to me riding the rental, and I was probably only doing 15mph.