I tried Paintball once, it wasn't the physical act of running around that put me off, it was the pain of getting hit. Especially when your told that shooting someone at close range is wrong, AND told that shooting the head or exposed skin (ie, unprotected), and then for my friend's gun to accidently go off, while at point blank range aiming at the back of my, unprotected head, is an experience I never want to occur again!