I was put in this position once, except i WAS in a slower car
car in front is doing 30 so i think this is ridiculous and start to overtake, then as i start getting past him he speeds up and keeps the nose of his car up to the middle of my car, all the way upto 80mph and its taken long enough that a lorry is heading towards me and i dont have a lot of time
when it came to it i couldnt slow down quick enough to get behind him and i wasnt gonna put myself into the front of a lorry, so i decided screw him and pulled in, effectively cutting him up, was a hell of a risk but to be honest i thought i was dead i barely got out of the way of the oncoming lorry
about 3 minutes later i got a call off my younger sister out of the blue asking if i was ok cos she'd had a teribble feeling that something bad had happened to me, its fair to say i was a little shaken by it