I've been studying this for a few years now, making a mental note when a driver gets on my rear bumper and has a murderous look on his face despite my doing sufficiently over the speed limit on a highway. I've noticed a remarkably high percentage of them are driving Nissan Altimas. I'm not sure what that's about, but I think it's because Nissan has always sort of positioned itself as the slightly more manly alternative to Toyota and Honda, a little more growl, having offered a V6 in their sedans long before Toyota and Honda got around to it. (Calling the Maxima a "4 Door Sports Car" has been another reflection of that image). Are you Nissan drivers all lunatics??