Jeez!!!
I can't imagine one actually breaking, they're that tough!
I don't think I've seen one go yet, even at worksop, and that surface grips the shock towers when you land upside down.
I landed upside down the first time I raced it there and the shoc tower survived, but it broke the upper gearbox casing, as that was the weaker point.
So I can only imagine they are monster crashes or the surface you race on is a bit strange?