Zip Lines?

[rush247]

After a recent stay in Whistler, BC where I went on my first 4 big zip lines I started thinking these might be a cool thing to have in the game.  How hard would it be to add such a thing?  Anyone else think it might be cool?

 

Here's a video I took of the first one on the course, just to help you all get a feel of what it would be like.  Please excuse my excitement.

 

Edited May 28 by rush247