My dad and I were driving home from the USGP, and coming out of Indy I-70 merges from 3 lanes to 2 with no warning. We were in the left lane, not speeding (there was way too much traffic and my dad's not a dumbass driver) and suddenly realized we had to merge. There was a car whose rear bumper was at our front, and a semi truck about 4 carlegths back
well my dad starts to slow down and put on his blinker to merge and not cut anyone off. He suddenly says "oh shit" and slams on the breaks, and I look to our right and the semi has powered up to about within 3 feet of the other car (in the lane next) bumper. My dad did as best he could to stay on the road but we took a little offroad detour and turned his 5 series into a I-6 lawnmower for a bit in the median. We got back on the highway after a few nice motorists slowed down to let us on, and we sped back up to get the trailer's license plate on the truck. After calling the highway patrol, we sped towards the front of the truck to get the real plate. When he saw us coming, he slowed down (now in the left lane, us passing on the right) to 35 MILES PER FUCKING HOUR on the highway to try and prevent us from getting his plate (06969 South Dakota...i'll never forget it). When we finished the call and took off to avoid further rage, I don't think he went faster than 50 mph.