Well, I knew that much. I guess I assumed they had motion-limiting stops to keep the blades from going into a reverse-thrust configuration.
Oh. You mean they don't?
That's a little more than I wanted to know!
Seriously though, I would think that a professional pilot would know how to deal with that situation. If there's any way to deal with it, that is. All it would take would be a bad relay contact, or some other glitch, to make it happen.
(steely)