Needs help with activites for sweet 16?

my birthday is in a few weeks and i cant think of anything to do... i dont like the whole girly dance, slumber, spa, attention crap. i want to do something outside thats fun like paintball or something but i cant think of it and its stressing me out. i think of myself as a grown up so i dont want to do anything kiddie either, help? give lots of ideas please