Challenge and Confidence

When it comes to challege to a dangerous thing, most people are very afraid of it at first. I also am afraid of thrill seeking activities such as rock climbing, bunjee jumping and skydiving and so on. However, I try to challege thrill activities and want to have a confidence to achieve my goal.
These are two things which I'd like to challenge bunjee jumping and skydiving.
When I read a real story about an eldery woman who was at the age 0f 70 or 80, she challenged a new risky activity, skydiving. After she did skydiving, her life was filled with energetic and vivid life. Even though she was very old, she tried to a risky activity. I was really embarrassed about it. In case of bunjee jumping, most young people prefer to a risky and excited activity. Of course, it could be a dangerous activity. Some day, I would do bumjee jumping and feel enormously exciited.
The purpose to study here in USA is another challenge for me. I think Challenge and Confidence are very essential to live my frutiful life. Enjoy and challenge a risky activities !!