A couple of days ago on a rare warm day this spring, I was out riding my trike. I pulled up to a street crossing on the MUP and was waiting for traffic to clear so that I could cross. A jerk in a one ton diesel pickup went by, and just as he did he laid the throttle to the floor and belched out a huge cloud of black smoke. Since I was on the trike and at the level of the exhaust pipe, I got the full effect of the smoke. Im sure the idiot thot it was funny.