Echo above fears. Looking down a cliff, tall building (=tall enough so it will hurt if you fall ~20ft) and additionally cable cars, rollercoasters. 500hr ppl, aero and night ratings. About 30hr in gliders, 3 in an R22 chopper.Sometimes strap the back seat of an airliner to my butt, no issues with height there.
Would NEVER bungee jump, or leap out of an aircraft with a piece of silk attached to my posterior, unless I knew the imminent crash was going to be unsurvivable, and I actually had a 'chute. A situation that would never happen in real life.
Occasionally the feeling of vertigo looking down from a tall object is strong enough to cause slight dizziness/stomach churning.Sometimes it's hardly evident.