It sounds just as painful as it looks...
Homemade amusement rides can often be lacking in the health and safety department (
see here) and this guy in the US certainly could have done a little more to make sure his homemade zipline was secure before taking it on its maiden voyage.
Skip to the 0:15 mark to see/hear the fail...
http://youtu.be/58F_V1TQW5w?t=15s
We feel a bit bad for laughing at the guy who’s obviously in a lot of pain, but the noise he makes at the end is just too funny not to laugh at. According to the video’s uploader, the bloke in question only received a few minor bruises, so that should make you feel a bit better (it did for us).
After hearing that sound at the end we can’t help but be reminded of the wine-stomping lady and the Felix Baumgartner 'impersonator'...
http://youtu.be/aMS0O3kknvk?t=50s
http://www.youtube.com/watch?v=YJBbdCEcwbs