Well, I gotta get back to the Canyon, but not that walkway.
As I said last night, I had to be escorted out of the Arch in St. Louis. When we were in Aspen one summer, we took the cable car up to the top. Jr. was three and on my lap and kept saying "look Daddy." When we got out I told the Mrs. I was walkin' down. She found a ranger who drove us and some other folks. He said it happens all the time.
It's a totally irrational fear. I ~know~ I'm not going to fall. But it can induce an all out panic attack for me.
Yup, I sympathize... have felt very vague tendrils of the same sort of fear but not much thankfully.
If we get to do Canyonmoot, you can stand and take pictures of those of us on the walkway :)