Kryptonite bike lock to your noggin! Overzealous pedestrians are the worst. When I was in the fifth grade I got pushed off the sidewalk and into oncoming traffic by an old lady. Granted I was riding really fast and almost took out her granddaugher, and having lived through the depression and two world wars she felt well within her rights to do so. But i digress. 

This video, shot in Manhattan pits a cyclist against some really angry passerby. You can guess what happens toward the end.