I had a duck take me down hard once. The damn bird spooked and flew right into my rear wheel when I was doing 20 mile plus. Took me down hard. I had to bang the front wheel on the side of the road to straighten it out enough to pass through my fork blades and take off the front brake to ride home. Plus I was picking out duck feathers from my campy NR rear derailleur for a while. It shifted fine though even with a few extra duck feathers,