A shocking video has emerged of a passenger slamming a car door on his friend's head shortly after being involved in a car crash. <br /><br />The footage, captured in London on Tuesday, shows two cars attempting to overtake a line of queuing traffic. <br /><br />The car behind can be seen slamming into the back of the front vehicle, causing the driver to get out and check the damage.<br /><br />As the front passenger exists the vehicle, he ends up accidentally closing the door upon the rear passenger's head, who is also trying to get out.
