I completely agree with Ivan. Unfortunately, 35 ft. can be a killing fall if you hit your on your face, temple, directly on top of the the head, break your neck, etc. What is survivable all depends on how you hit, and what you hit. As Ivan noted, there's plenty of protruding rock and sharp-edged debris at Horsethief which can cause very serious injuries. People have died falling off of 6 ft. stepladders or down their own front steps. People die almost every winter somewhere in the US falling on ice-slick sidewalks. It can take surprisingly little for a fall to be permanently crippling or fatal. Helmets might have saved these two people's lives, not necessarily their ability to walk, breathe on their own, use their arms etc. But the chances would have been much, much better.