People who suffer from acrophobia like me understand the struggel.
Funny story about that: My parents took me to the mountains and all in all no problem, but when they decided to scramble up a wonderful little hill at a measly 1838 metres it was all over for me. It was quite steep and I generally had a headache already. At the top, my parents wanted to eat fries... WITH A VIEW DOWN! To cut a long story short: I fell over and was suddenly at the ground again.