Oh dear Lord! Good luck with that!
It's one of those things I would LOVE to do, and I hope I do, but I don't know if I have the guts for it. I went on a giant swing on my class trip this year (you're in a waist harness attached to a rope and you pull a release cord and swing) that was only about 60 something feet in the air, and I was having a heart attack on that!
and I'm one of those pessimistic people who can only think about the bad things that could happen.