Interesting thread. Never had a problem airborne in anything. I can stand on the edge of the house roof where if I fell I could be a goner. However the edge of a 1,000 ft cliff (many here) no way
We guide walking groups here, some people suffer vertigo in different scenarios. We have some clients who are happy with narrow cliff paths with dead drops but not happy with a narrow path on a 45 deg scree slope and vice versa.
There is a 2,000 ft cliff here which drops straight into the sea. At one point there is a very wide shelf about 5 ft down. My party trick was to rush ahead of the group and drop down onto it pretending to be hanging onto the edge of the cliff. Mrs Exascot has put a stop to that one, threatened to stop the beer allowance