What's the worlds most dangerous and extreme sport?

[Gandahar]

Extreme sports have really taken off in recent years, fueled by advances in technology and more leisure time to do them in, but what do you think is the most extreme and dangerous extreme sports?

[Gandahar]

Perhaps the question should be, you are doing a really dangerous sports and how far away are the emergency services?

Cave diving you are really on your own

http://www.bbc.co.uk/news/magazine-36097300