Heights are somewhat subjective, depending on your point of view, at least to me. I've made a little over 1,000 skydives, not much by today's jumpers standards. But there was absolutely no fear in climbing out , on, and over different aircraft once you were up there. Of course having a dual parachute system helps in that regard. But a few years ago I had to climb a 20 foot stepladder. Took three tries.I was trying to figure out how they built that thing.