Some years ago I used to play competitive paintball and travelled all over Europe taking pictures for ForceOfNature.com (USA), PortalPaintball.com (ES/PT) and Bolasdepintura.com (ES). I met great people and took some nice pics. These are my favourites. PS: I'm the one in the main picture, but (of course) I did not take that one :)
Paintball's unique characteristics make deep concentration during a match paramount. I used to say it is like chess, only faster (and with guns).