There are few things more infuriating than another driver doing something unseemly behind the wheel in the area that you currently occupy. That's what triggered this bout of road rage, and these two guys take the conformation to a new level.
For one, there seems to be a woman involved to some degree, and while she (thankfully) isn't subject to any of the violent haymakers shown, that always escalates things. Beyond that, you don't see full-fledged punches to this degree on the side of the road every day, and the streets of London probably don't either.
Road rage is a gateway to other unbridled anger, and in this instance, it appears that these two men weren't stopping until one of them simply couldn't continue. That is exactly what happened.
