ahhhhh.....here we call that "puenting". I did it a couple of times, loved it
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I gotta disagree with you, if you get the proper precautions, is very safe. The dynamic ropes used for it can stand thousands of lbs of tension, and the arnesses (sp?) used also are very secure.
All you have to do is to know how to fix the rope properly, and knowing the altitude you're jumping from to avoid finding the "hard way" that you used too much rope.
In my case, both times I've done it, we always were sure to leave a good dozen of meters of clearance between the top extension point of the rope and the ground.
So, If Elfenwolf has had an accident while doing this activity, I guess he had the latter problem and he used too much rope. I can't believe the rope broke (is impossible), and everyone who's doing this kind of thing MUST know how to fix a rope properly. So I guess he wanted to "touch the ground" in the lowest part of the jump...and he touched it too hard
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He has been VERY lucky to survive. If you're gonna do a risk activity, at least be sure you do it the safer way and be sure you stay well clear of the ground...Guess that is what he'll do from now onwards, if he stays doing this kind of jumps.