Ultimate (also called Ultimate Frisbee) is a competitive non-contact team sport. The object of the game is to score points by passing the disc to a team member in the opposing teams end zone. Players may not run while holding the disc. Catching is done with one hand or both hands on the rim or hands simultaneously on the top and bottom sometimes referred to as a clap-catch. When one-hand catching on the rim, care must always be taken in hand placement and making sure to catch on the correct side of the disc, according to which way the disc is spinning. One side will tend to spin out of your hand, while the other side will spin into your hand, making for a more secure catch. Many players avoid this problem by always catching with both hands when possible. The most popular throws used in a game of ultimate are backhand, sidearm/forehand, hammer and scoober. Being a deep threat with multiple throwing techniques and the ability to pass the disc before the defense has had a chance to re-set, is always optimal. Some players use a throw and catch freestyle practice to help improve their ultimate handling skills.[9] The game was invented in 1968 as an evening pastime by Jared Kass. Ultimate is distinguished by its Spirit of the Game – the principles of fair play, sportsmanship, and the joy of play. USA Ultimate and Ultimate Canada are the rules and sanctioning organizations for ultimate in the US and Canada. The American Ultimate Disc League (AUDL) and Major League Ultimate (MLU) are the first semi professional ultimate leagues. The Major League Ultimate (MLU) ceased operation on December 21, 2016.[10]