Angry Biker SMASHES WINDOW with ROCK! (Revenge)

A motorcyclist filmed himself getting his retribution on a driver after getting hit by a water bottle as the incident quickly escalated when both parties swore at each other.

Filmed using a head cam on a road in the US, the biker is shown driving along an open country road when the dramatic incident unfolds. 

Flying up the inside lane, a navy blue people carrier speeds past with the passenger clearly infuriated by an earlier confrontation as he puts his middle finger up the motorcyclist. 

The biker speeds up doing the same motion back at the passenger.