I was walking across an in-park maintenance road with some friends. It was just another part of the park, full of people, dogs, kids, bikes. A rider was bearing

I was walking across an in-park maintenance road with some friends. It was just another part of the park, full of people, dogs, kids, bikes. A rider was bearing down on the spot that I was about to walk through, screaming "get out of the way, I can't break!" She was angry. In a crowd of pedestrians. I really didn't know whether to be amused, astonished or outraged that she would ride that fast in a crowd with no breaks!.