Grist.org serves up a dish of vengeance (that’s best served cold, btw) in this story of an off-duty cop referred to as K.C. who chased down a perp after he purposefully tapped her bicycle with his car.
K.C. is the blogger behind the site A Girl and Her Bike, and she regularly rides to and from work and writes about it on her site.
The Grist.org article is a good summary of the event, but the full account from her blog is better and includes the full account of how the drug-dealer who bumped her was caught, and the dates for his hearing.