We had an incident over here recently where two cars knowingly hit a bicyclist and left her to die. It was very gruesome. I remember hearing that the first car slowed after they hit her and the second car dragged her several feet. Most of the witnesses weren't even able to comply with the police because they were in too much shock.

http://www.sfgate.com/cgi-bin/articl...n060004S84.DTL

I don't know whether it is deliberate cruelty or fear or both. Whatever it is, it's deplorable.