I see. You've feathered the leading edge of each of the cross beams.
Ah, but note that the rock you're proposing would also have caused the leading surfaces of the proposed ski to deflect further upwards. Bringing the hole and the second beam further up off the snow.
In order for the rock to actually stick in the ski, the ski would have to have a very fast recovery from that initial deflection. Which brings me to my original questions in this thread - questions directed to flex (the ski's response to stimulus) and to the speed at which we assume it will be used (which will govern the shape of the stimuli we can apply). I
I wouldn't want to rely on that (the ski not snapping back quickly) to protect me from that sort of an accident! Note also the point at which the rock is causing the upward deflection is necessarily forward of the point-of-concern, and thus the upward deflection at the latter point would be less -- so even if the ski snapped back only partially during the interval, the rock or stump could still catch it; indeed, it could be that, because of the flex of the ski, the point-of-concern isn't deflected upward much at all.