Friends Season 5 Episode 21 : The One With The Ball
Phoebe and Gary move in together – then break up after he shoots a bird. Rachel buys a hairless Sphinx cat, which disturbs her. Ross and Joey pass time by tossing a ball back and forth, and subsequently try to make a record of how long they can throw it, without dropping the ball. Their game is disrupted, however, when Monica feels the need to include herself. Chandler is called a 'Dropper' when he wants to join the game.