No, fortunately i did not. It was a fairly shallow slope on the leeward side of the hill. Very awkward stop though. I had 5 skid pads on the tire and was able to seize the wheel a few times times, but eventually fish tailed on the last skid and then hit the front brake as a last ditch effort.

The driver ignored the bike lane and was looking to squeeze past a line of cars get into the right turn lane, but didn't make it.