This character plays paintball.
Paintball is a sport in which players compete, in teams or individually, to eliminate opponents by hitting them with capsules containing food coloring and gelatin (referred to as paintballs) propelled from a device called a paintball marker.
Paintballs have a non-toxic, biodegradable, water soluble mineral-oil. The game is regularly played at a sporting level with organized competition involving worldwide leagues, tournaments, professional teams, and players.
Paintball technology is also used by armies to supplement military training, riot response, and non-lethal suppression of dangerous suspects.