As a kid, I was a tree climber. Big trees. I also climbed telephone poles. Those sort of heights never bothered me.
Standing on the roof of a skyscraper and looking over the edge is something else. It gives me the willies. A strong wind makes it worse, a building literally can sway several feet back and forth, they also shake. I get a tingling feeling, the rush of adrenalin kicks in. I’d never climb a tower on a rooftop like that.
Never had a problem with trees either. I was a climber. We had a couple of great willow trees in the neighborhood.
As someone else said about 10,000 posts ago, it's probably the fear of falling above some arbitrary height. Also, as someone said it's not the fall it's that sudden stop at the end that gets you.
I used to fly a lot when I was working. I had a period of time where I would look out the window on landing and think if something happens at this height (like 50 ft) we'll probably survive. Totally irrational.



What I'm looking at through this lens of time are incredibly fine colleagues.