This is something I found last year, a utube vid from a Chuck Martin mogul camp. During winter, Chuck holds two adult camps over at winter park to work on mogul skiing alone. The vid shows the instructor, noticed his hip location, it’s forward, thus it allows him to bend his legs when he absorbs the bumps, the troughs were deep enough for him to go near max range. His upper body is not jarring; the leg by bending and timing it correctly is taking the impact. Yes, there is some impact but not as much as people believe, as Dipiro mentions and from my experience; the impact is equivalent to jogging. Also notice that he is using WC techniques in natural (actually skier) made moguls (from first hand account, the moguls were not made by seeding them with a machine). He keeps his hand in front, elbows are held out when he poles and the non poling hand counters the upper body rotation. A nice visual of some of the WC tech that has been mentioned in this thread.
That said, I do enjoy watching a fast zipperline descent with the kind of air show put on by the likes of Nate Roberts. The bad news is this kind of skiing does not work all over the mountain and especially not on steep terrain. I know you will strongly disagree with that comment and I believe, contrary to what BMM says, that we really do need to get together and share information on our different approaches while actually skiing. Jack, I respect your critical analysis and enjoy engaging with you. I have not forgotten about your desire for more info on my turn-blocking comment. I will try to get to that in a day or two.