15th Birthday Ideas?

I will be 15 on the 14th of February and I usually go paint balling or go carting. I like something that gets you pumped with adrenalin and something that my friends will enjoy (I'm a boy). This year I want to do something that will give me the same experience, but I can't think of anything. My idea was to go on an expedition, but I don't know if I really want to to that for my birthday. So any ideas what I can do will be greatly appreciated :)

By Caelen