On a ride with a friend. We were headed down hill with a sharp right turn near the end. We both hit the same patch of ice. He went down fast and hard. I went down too, but because of the extra time the grip from the studs gave me, I was able to unclip and break my fall quite more than he was. He's got road rash and a nasty bruise on his hip and elbow. I lucked out with minor hip and shoulder impact. No bruise visible five hours later. I'm so glad I was riding the studded tires today.