Damned near started clapping -- this is an amazing person. She should be commended and I completely support her actions to protect this guy. This woman is my hero.
She not only provided aid to the boy who was hit by the car, she defended the driver when everyone else watched.
As for the man who hit the boy, I don't know all the details of what went down, but beating him to death needed to be stopped -- thankfully, this person had the guts to do what needed to be done. Remember, this is a city where you're largely on your own in many areas. Based on what I can tell, it seems like a legit accident.