A friend of mine went down last week in the rain. He rides to work almost ever day regardless of the weather. He was riding toward an intersection and admitted that he was kind of day dreaming because he had been taking the same route ever day. Came up to a red light touched the brakes on the wet crown of the road and the bike went right out from under him.
He said that his jacket saved his elbow and back as he slid into the intersection. Luckily there wasn't any traffic coming in the other direction, it was about 5:30am. He picked up the bits and pieces of the bike that were scatted on the road. The bike was still ridable and rode the rest of the way to work and then rode the bike home.
He is fine and fixed the bike enough to continue to ride it to and from work again, daily.