Ahhh paintballing =P
I remember when we went with the school to some Marines day thing that had paintballing, was annoying coz the Marines were dickheads but the paintballing wasnt too bad =P
Being skinny helps, if you can hide behind a thin tree without sticking out, you're fine =P That's what I did, then pop out and bam!
And Light, about that gun going automatic thing, that same thing happened when I went (But not to me =P) Standing behind a tree then I hear a scream from Alanna who is behind the tree next to me...look around and her gun is going off like crazy and she is trying to control it. After nearly pissing myself laughing at her I take her gun and smack it against the tree to unjam it and then I got shot -.- Grrr, she got shot shortly after though so I could laugh at her some more before the round ended =D