Some people are quite comfortable in such places. They probably have an excellent sense of balance. I have both bad balance and a fear of heights. Or, maybe one causes the other.
I can sit in a plane while it's climbing & look out the window - no problem. But high places where I have to balance....forget it.
How's this for heights - and climbing skill (he was killed in 1998 in a fall)
No way in hell, would I do that. You see those steel beams. They'd never be able to break my grip on them. There's absolutely no way anyone could get me to be 86 inches off the ground, never mind 86 floors.