Have you heard of the team sport,  Ultimate? 
Oh yes, I love Ultimate! Do you play often?
Not as often as I would like.  I thought it was a new sport, but it was developed in 1968 in New Jersey. 
Wow, that's fascinating! I always assumed it was a more recent sport too. If it was more warm where I am I'd love to play more, sadly it's too cold so people don't want to play!
From its beginnings in the American counterculture of the late 1960s, ultimate has resisted empowering any referee with rule enforcement. Instead it relies on the sportsmanship of players and invokes "Spirit of the Game" to maintain fair play. Players call their own fouls, and dispute a foul only when they genuinely believe it did not occur. Playing without referees is the norm for league play but has been supplanted in club competition by the use of "observers" or "game advisors" to help in disputes, and the professional league
Ultimate (sport)
Ultimate, originally known as Ultimate frisbee, is a non-contact team sport played with a flying disc (frisbee). Ultimate was developed in 1968 by a group of students at Columbia High School in Maplewood, New Jersey. Although Ultimate resembles many traditional sports in its athletic requirements, it is unlike most sports due to its focus on self-officiating, even at the highest levels of competition. The term frisbee, often used to generically describe all flying discs, is a registered trademark of