I got my parents to do it, if that helps any. We signed up for it online before we left. Once we saw how high the second zip-line is (first one is a training zip-line about 15 feet high), my parents got really nervous (BEST part of the trip right there
). Heck, I was pretty nervous myself, too- in a fun, thrilling sort of way (it was my birthday, so I got to go first and everyone in my group sang happy birthday to me right before I jumped). It's basically like a big roller coaster: after the first one, your ok with doing it again- in fact, you WANT to do it again!