What is the dumbest thing you have seen while on the road?

Driving our MH on the express way in San Diego. As anyone who has ever driven on multilane freeways in San Diego knows, they don't ever widen the freeways, they just repaint to add another lane. Anyway, the lanes are very narrow and I'm actually white knuckled driving in rush hour traffic. Then here comes Willie Lumplump driving his car next to me with a pocket novel on the steering wheel reading it during his commute.