Does anyone use a helmet camera or have used one? Usually, the law enforcement is not supportive of cyclists's claim about harassment, or attack by motorists, and so a helmet camera may be useful. Once a cyclist was beaten up by an angry motorist, and the police believed the "story" of the motorist, that the cyclist attacked the motorist with his bike. But a group of kids filmed the whole incident showing the motorist pounding away at him. Is a helmet camera useful, or a bike mounted camera, such as the Digital Hero 3, GoPro?