Eh, thats when you get in there face back, & try & drive him off the road,Or call the cops as your driving. Me & my friends had to do that once. We were driving back from N.C. or S.C I ferget. And this guy in a van, my sister was driving my truck at the time, these 2 black guys in a van cut her off doing like 70, So my sister, well you have to know my sister, Sped up and cut him off, cause he was doin all that brakey stuff and what not, then he followed us, tailgating & what have you, So we called 911 after about 10 min.of tailgaten & yada, told em the deal, we had no idea where we were on that highway. so we had to wait till we got to a exit or whatever, so we can tell em our location, all in the meantime our phone was cuttin out, pritty annoying, but like by the time the Officer had gotten on the road, he had JUST gotten off, but it was pritty cool, we told em it was 4 gyrls in a blue jeep, and 2 black guys in a van, they were tellin us all what to do, it was cool...annnnddd the cop found us followed for a little, drove by gave a thumbs up to see if everything was alright,, it was cool, that was prolly the only time a officer has helped.! Thats my story & im sticken to it...LOL