Has anyone actually broken a steering box?

I just noticed that Flaming River (and possibly others) advertise their manual steering box as being stronger than the stock one.

That sounds fine...but what the hell kind of gorilla would it take to break a stock one? Or...am I underestimating the strength of some component here?

Have you broken one? How did it happen? Is the upgraded box worth the extra couple hundred bucks over a (reman?) eBay piece?