This is only a small example of the dangerous behavior cyclists are subjected to on a daily basis due to poor driving. In most cases, calling the police and reporting a crime doesn't foster much of a response without indisputable evidence.
It seems now that helmet cameras are a cyclist's new best friend. This device will give you indisputable evidence against the offender.
For those of you thinking about, you should opt for mounting a personal camera to your head rather than the front of your frame. Often times identifying the driver is extremely important for a conviction to be made. Rear facing cameras can be useful for identifying drivers coming up behind you, but if you only have one camera I would opt for mounting one on your helmet.