I nominate a driver I saw last night.
I work in a hospital (I'm in the business office, but we're physically in the hospital), and driving cross town from work on a road which is semi-country (fields most of the way, but there are some businesses here and there, mostly towards one end or the other of the road), two lanes (one each direction) although wide enough that they could put a third lane in. This road is quite straight, and mostly flat, so you can see almost all the way to the other end of the road from where the hospital is.
As I'm driving on this road about a half mile from work, I see coming toward me an ambulance with lights and siren on. There's a car in front of the ambulance which did *not* pull over, but did take a turn after about a quarter of a mile (so they left the road in question). Everyone in my direction of travel had pulled over and everyone else in the other direction had also, so once the SS departed, the ambulance came down the middle of the road to get to the hospital.
Because clearly, being delayed for, at most two minutes, is just absolutely intolerable for a SS. I can't imagine where one might be going that is more important than getting a patient to the ER (I know that not all ambulances come in with lights and siren, so when they do, you know it's quite serious and one of those 'every minute counts' situations).