Each time i've been, i've slept like a baby that night as its so tiring.
Depending on where you go they are usually very strict with safety rules.
On one that i went to if you broke a rule within camp you were 'executed' from 15yds away. Each subsequent rule broken after that brought you 5yds nearer.
This one guy (called Kev, see later) broke 3 rules and was executed by about 30 of us from 5yds away.
Lol, the force of about 500 paintballs hitting him in one go almost blew him backwards off his feet. He looked like a retarded decorator after he got up.
I got shot in both eyes during one game. Luckily the goggles were in place and in tact. Got shot in one eye by my mate as i popped my head out from behind a barricade, marshall wiped if off for me. Popped my head out again and my cousin who was holed up with my mate shot me in the other eye, lol. Each time it rendered me blind until the marshall wiped the paint off.
At the end in the last game someone shouted "get Kev!" i thought they meant Kev who got executed earlier...forgetting that Kev is also my name, and that's who they actually meant. I was caught like a rabbit in headlights against a wall when they blasted me. Funny thing was it left an outline of my body on the wall where all the paint had hit around it....
...still.....i maintain its brilliant fun!