In our time, life is not so interesting and exciting as it can be. The world has become a bland and safe place. Each day is like another and we are so tired of such life. People in the past used to risk their life by hunting animals, taking part in expeditions. We need some adrenaline and extreme to feel that our life is going forward. Risk sports become the fastest-growing leisure activities. More and more people try anything from organized bungee jumping to illegally jumping off buildings. And people never feel so alive as when they are risking their life. The real thrill-seekers in their quest for the ultimate sensation are thinking up more and more elaborate sports....