Stupid assholes like that, you're better off just letting them go. Nothing is more hilarious than a road rager weaving in and out of traffic trying to go fast, while I just drive with the flow and pass him. You can't go faster than the slowest guy in the traffic queue. The best way to go fast is to give yourself a nice gap, you give people space and they instantly make better decisions behind the wheel. Crowd them and all that pressure makes the asshole come out.