Speak about risky sports.
In my opinion, risky sports are dangerous and very expensive for practice them. Firstly, when you practise a sport which is necessary a belt and a rope, there are some possibilities that these equipment can break. This happening (avoid/prevent) me for do these type of sports. Because of this I have never done for example: bungee-jump or skydiving. There are a lot of people who has died when they were practising these sports.
On the other hand, practising these sports are expensive. There are different causes for this: there are few companies that offering these services and two, the necessary equipment for practise these sports have a high price.