As for me, I do not feel comfortable functioning at heights. This is not to say I have any real fear of heights, and I have ample credentials to demonstrate that fact, most notably taking skydiving lessons a few days after graduating from high school. I can and have and will again function at significant heights; I simply do not like doing so and always feel like I am out of my element.
At the same moment, I am wondering if I could successfully navigate a descent of the cliff without actually falling. There is a small protrusion from the cliff ten or twelve feet below me, and I am visually trying to pick a pathway for jumping from outcrop to outcrop until I safely reach the beach below. Once upon a time, this was sort of a game for me, and I never took too bad a fall doing it. But, this cliff is steeper than those in games of the past -- almost sheer. A new and more difficult challenge.
The dreams always end at this point, with me waiting to discover if the unknown person behind me will toss me a rope and, at the same time, considering making an attempt to actually descend the cliff.