what's the word for "freaked out to look at the ground from 2,000 feet, but not from 35,000 feet"?

[septimus]

I refer Honourable Member to the answer I gave nine years ago:

@septimus

I have acrophobia and have occasionally heard, or known by myself, that it was often more a fear of jumping than of falling. Wiki and Google do not confirm this; they mention a different phobia (Catapedaphobia) but it doesn’t seem right either.

I also get the sensation Cheshire Human mentions but, fortunately, it’s just a light fantasy not a disabling fear.

I don’t fear heights riding airplanes … except (slightly) when next to emergency door!