I watched it a few times. I think the biker was an idiot for rising up to the frustrated car driver's taunt as he sped off at the traffic light. In the end he's the one facing jail time now.
This is typical here: people inch forward on the red light trying to get an advantage. Bikers should think of self preservation first.
I ride 10,000km per year in Singapore and I know for a fact that in a collision with a car/van/lorry I will always come off worse.
Also, with regard to car drivers changing lanes as soon as the lane next to them looks like it's going faster, expect it, it happens all the time.
I'm not condo
ning the car driver at all; just pointing out that you can't go around trying to educate people on proper driving by punching their windows in, as much as one would like to.