I'm not sure if anyone has seen any of this stuff before but it is absolutely insane. All of the punches and kicks thrown are totally and utterly fake but as soon as they finish with the fake stuff they start hitting each other with barbed wire baseball bats, smashing lighting tubes over each and throw shirtless guys through glass windows.

Here is an example but don't watch it if you are squeamish or under 18. (its a youtube link though so how bad could it be) http://uk.youtube.com/watch?v=ulTRgDCp4ZE&feature=related

I am really confused with the fact that it looks very fake but everyone gets really hurt. I don't understand the motivation for this or how people are able to endure it.

Any thoughts?