I just got back from a 12-day trip to Costa Rica. I spent the day after Christmas ziplining through mountains and trees and clouds. We were in Monteverde, a really cool mountain town & cloud forest somewhere around 5,000 feet.
My main fear was going too fast along the lines -- I'm not a big fan of roller coasters or quick drops. But the wind was so strong that day, it turned into a fear of going too slow. When the wind is strong and you are not so heavy, it can interfere with your ride. So... my friend and I both got stuck on the lines at various times along the way, hanging on by just a cord, a hand, and lots of wind throwing and spinning you every which way. The whole thing was an amazing experience. Although I must admit, the final line was a half-mile long and while I was stuck in the middle being thrown around by the wind, I screamed at the top of my lungs "I thought this was supposed to be fun!!"
Here's a video of our experience. I got a clip of my friend, Angie, stuck on a line so you can have an idea of what I'm talking about: