I always enjoy playing ultimate frisbee in the park with me friends. Especially because it is none contact, and less risk to get hurt. 
I don't know much about it but it looks fun. Do you know anything about its history?
Ultimate was created by a bunch of students at the Columbia High School back in 1968. It has grown very popular since then. 
Wow, i didn't know it went back that far. I would have guessed the 90s
I have only seen people play it fairly recently. You gain points by passing the frisbee to teamates in the opposing teams end zone. 
Oh I see. So your teammate has to get into an endzone and then someone has to pass them the frisbee.
Correct! Unlike many other sports, the game is self-officiated. Meaning that the players are the refs, even at the highest level of gameplay. 
I would think that would cause problems. With no impartial judge, that is.
The game requires the players to have a high level of sportsmanship. The use of refs is highly resisted among players.