Throw a disc to your teammates on your way to the end zone to score points
The first games of Frisbee were played with upside-down pie tins. In modern ultimate, you throw the disc to your teammates to advance down the field, and score points by catching it in the end zone. You can’t run with the disc in your hand, and if your disc falls flat, the other team gets possession. Celebrate victory with pie, take solace in defeat with…also pie.