Was on descent yesterday with a very strong crosswind.  Got up to a little over 40mph when i made the decision to basically brake to a near complete stop as it felt unsafe.  had knees clamped on top-tube and was bracing myself.  While decelerating, my bike went out of control.  The wheels seemed to be oscillating and violently shaking the bike even as I braked.  Felt like both wheels had turned oval and I had blown out the tires (I hadn't.  Wheels were perfectly true.)  I ended up crashing in the ditch and breaking my hand in three places. 

I'm not super light at 158 lbs and was on my Chapter 2 Rere with the latest Mavic Cosmics.  I've experienced crazy crosswinds before even to the point of having to put a foot down.  But I've never had my bike suddenly start bobbing up and down so violently that i lose control. 

This took me forever to type since hand is in cast.