Rugby isn't that popular where I'm from, so I've been trying to learn the rules so I can follow the Cup. From what I can see, big beefy guys run down a field & try to break through the other team, upon which they're body-slammed by five other big beefy dudes and the rest of the team piles on. Every now & then someone takes a set shot at kicking a goal.
I'm not sure what happens to the ball at other times in the game.