I have to tell this story: I was following a big ass F-350 one day. No smoke or anything. We stopped at a redlight. Bunch of nogs standing on the walk. The truck took off and rolled coal. all you could see was the whites of their eyes. I didn't even move. I sat there laughing. They disappeared in a cloud of black smoke. They ran out of it coughing and fanning their hands. It was truly a glorious day to be alive.