Discription of Events: Was speeding way over the speed limit, at least 10 above. (I was 5 above, and he was clearly MUCH faster than I was). They swirved in front of my car. When they couldnt get around, they started tailgating the person in front of him very heavily. At first I figured he might be in a rush, but then I realized he was showing off! He would rev his engine, slow down until he was a few feet from the car in front of him (100-150ft?)... Then rev his engine to full, very loudly, very showy, and accelerate hard. He would then slow down just before he hit the car in front of him. He would slow down -5 or -10 below the speed limit, open up another 150ft to rev it again, and would repeat. He did this "speed up show off maneuver" 5 times in total. He swirved visciously into the left lane towards the end.