[aeternus]

My guess is that the driver had been yelled at by a biker in the past. I've seen bikers chew out drivers, or yell profanities many times in SF. They sometimes/usually have a good reason to do so, but that kind of behavior just breeds contempt and animosity between the two groups.

[sgarman]

I think that's reasonable and sometimes find myself in that group. Instead of yelling what do you think the is the best way to handle a driver intentionally running you off the road?

[JohnFen]

I wouldn't hesitate to note their license plate # and report them to the police. It may not help, but it might -- particularly if more than one person reports the same car over time.

[rhinoceraptor]

Take out their valve cores once they park? :)

[actuator]

Yeah, sometimes they have. Once riding around a bike near Powell street in SF in a bike lane with 10 mph limit. A car approached me from behind. Initially it was probably at 40 mph but it slowed down as it came near me. But it was scary as hell as you have inherent assumptions when you are in a bike lane.