Hey that reminds me when I ran over a running goose on my bicycle. It was chasing another goose in the park and boy, if you don't think those things can turn on a dime on the run, let me tell you they can turn on a dime! It ran with half-flapping wings right under my studded winter tires (sorry bird), I got a bit of air, and we both kept going. It probably was feeling it for a few days after that.
Not the same as what happened to Kornfeil but it goes to show, bikes generally want to stay upright all on their own.