I often dream of flying even when I was a kid. Yesterday, I lived the dream. I flew 30 feet high, 106 meters far, for about 15 seconds; all this happened while I was wide awake and screaming on the top of my lungs.
Thanks to the inventors of the pulley system, without them the zip-line would not be possible. The zip-line is a combination of a pulley system on a cable attached to an incline. Zip-lines are chiefly used to traverse forest canopies. These days, the zip-line is becoming a popular outdoor recreational activity for adventurers and tourists alike.