Not sure if you guys heard, but there's this obstacle course, of sorts designed by British Special Forces. It's designed to test physical and mental strength, and plays on common human fears, such as 'fire, water, electricity and heights'. In each event, there are about 20-25 obstacles:

To me, it looks pretty fun, but at the same time, pretty frightening. As of right now, I don't think I'd be able to complete it, if I competed.

Anywho, would you participate in this? Do you think you can? Or have you ever done this before?