I am scared to death of heights.
The tallest thing I have even been on (except flying, and I'm not fond of that either) was the 1,149-foot Stratosphere Tower in Las Vegas, and I wasn't really fond of it.
Before starting to work part-time for the Grand Rapids Griffins, I wasn't even really great in the upper deck at Van Andel Arena. It's gotten better, but I still hate heights.