I seen this one before, that guy has some skill behind the wheel man! shame he couldn't put it to good use really (ie, not escaping from the police!!!)
thye cops hitting his car was a manuver (cant spell it) they practise over and over, in which they tap the back end side of the vechilcle casuing it to turn and slow down, in which they then box in so they cant drive off again, as you see my the attempt where he starts driving backwards