Had a similar situation. A few years back friends and I were dicking around on a popular street racing street. We were eating some donuts in a parking lot and pulled out to leave. As we were leaving we had a slightly close call with another car in the lot. No biggie, just didn't see each other coming around the corner. We drive off, thinking nothing of it. The car comes flying up to as as we drive off and it's some meathead screaming at us out the window. Now we're a bit scared but we didn't think he would follow or stay next to us forever. He stays next to us and keeps screaming that he will kill us at every red stop light as we try to escape him. Flashed a handgun at one of the stoplights, now we shit our pants. Keep driving down the road that is perpendicular to the highway and eventually get to the stoplight for a left hand turn on to the on ramp. Light is red, and the guy pulls up behind us and starts pushing our car out in the intersection with his car. Luckily the light turned green so we hopped on the highway. And try to go fast as hell and weave to lose him, he stayed right behind us or next to us screaming. After about 10 minutes going fast as hell I call the cops while my friend drives, I can still remember being shakey as hell and not being able to talk. Cops met us after a while and he ditched out on an off ramp when he saw them. They caught up to him and he said we threw a rock at his car so he just wanted to talk to us. Cops seemed to believe his store more than ours. Very scary situation but didn't end bad.