Basically, same thing happened to me 2 weeks ago. Drivin' home from church minding my own business and "blowing any buildup out of the injectors" when this idiot in the slow lane pulls over into the fast lane. I slow down to about 75, there's nothing in the slow lane for miles so I move over to the slow lane to pass him (I'm 8 miles from home and nature is calling....bad). Then this punk pulls over in front of me again. I'm thinking to myself 'what the heck is this guy smoking?' Apparently it was a cigerette because he threw it out the window and a shower of sparks comes over my hood. Now I'm pissed. He then decides to bury the brakes. My wife (7 mos. pregnant) is about 7 shades of red. It was at that point that I flipped my hi-beams on and tailed him at a distance far enough to annoy him. I figure anything else (chasing him down, etc.) that I do at this point could result in a serious crash. If he'd gotten off at my exit, I believe I would have smacked him around like a two bit whore. Looking back now, I still can't figure out his deal.