Ultimate Fighting
Freestyle Powerisers Stilts
BASE Jumping
Wing Walking
Freestyle Motocross
Aggressive Inline Skating
Extreme Skiing
Ice Climbing
Sky Surfing
Bungee Jumping
Skydiving
Whitewater Kayaking
http://gambarunik.blogspot.com/2009/03/12-olahraga-paling-extreme-nan.html