here is something for you wally, I WANT TO DO THIS
In Haiti, worlds largest zip line over water. Next I want to do the 1.2mi one in South Africa (I think I read you get up to 110mph). Whistler, BC was awesome though, they don't make you wear those silly full harnesses; instead you wear a regular climbing harness so you can do cool things like flip UPSIDE DOWN!! So fun.
(there are videos for most of these on youtube, or is it juliotube!?)