Incredible Over-the-Top Road Rage

This cyclist honked his horn at van driver after the driver improperly overtook him. The driver, now angered, stopped his car and opened the door in the path of the driver. The cyclists road away for a brief moment, but was later chased down knocked off his bike and assaulted. It's unbelievable someone would act this way to another person, especially when the only thing the person did was ride a bike on the road. I think it's about time for me to get a camera for cycling.