Not considering the law, there's nothing really wrong with riding on the sidewalk. But, when doing so, one must be aware that the law offers you little protection there.

In the case of the OP, it might be different (might be, not is) id the car had hit him. But it didn't it only blocked his path, and the only consequences were the direct result of his speed on a sidewalk where he shouldn't have been in the first place.