This occurred during a local ride in LA: some cyclists were riding and a ****** in an SUV decided to tail the riders and swerve into them, attempting to intimidate them. Fearing for their safety, one of the riders decided to take a ulock to the car's window and shattered it. Luckily, a cop saw it and deemed it as self defense. However, if a cop DOESN'T see it, it's a sticky situation, unless there's other credible witnesses around.