There are so many people who always try to overcome something even it is very dangerous. And extreme sports are part of those things. By challenging to them, people can feel some satisfaction, which motivates them to do them again. I think this is the main reason why some people enjoy extreme sports. For example, when they do skydiving, all of them say it is really valuable experience and recommendable for many of us because it provides those who have much fears courage and great feelings if they finally do it.