This guy got mad at me for driving the speed limit and was tailing me, so I slowed down to let him pass me. When he passed me, he flipped me off twice and then cut me off. So I moved into the other lane. He cut me off again, so I moved to back to the original lane. He started tailing another car but they, too, were going slow. Eventually, I was driving parallel to him and thats when he rolled down his window and threw trash at my car. He turned north on to S. Picadilly St. from the stoplight at Smoky Hill and Picadilly.