Interesting question bhatch. Last winter a buddy and I were driving in his CRV (with ABS) and we were driving down an icy hill. My buddy was overly cautious going about 5-10 kph and yet we still started to slide. at the bottom of the hill were a set of lights with a dodge caravan waiting for the lights to change. We weren't too worried as me did not start slipping and were quite a distance away. Then as soon as the lights turned green we felt the CRV's grip suddenly slip and we were now sliding quite quickly towards the caravan. Again, no big deal, the lights turned green, so the can would probably get out of the way. Nope. Stayed still. My buddy started freaking out, honking the horn frantically, yelling to get the f*ck out of the way. We just plain couldn't stop. Turns out the Caravan was yeilding to an ambulance that had its lights flashing but NOT its sirens. I swear, every time I think about it, it seemed like it was 5 minutes of us sliding, completely helpless not being able to do anything. We eneded up slightly tapping the back bumper of the caravan with no damage. It was kind of funny how we were both freaking out and yet nothing reall happened. But scary as hell when it did happen. We laugh about it today, but my buddy has learned a good lesson from it