In 2004, the human players were utilized much more than in previous years. Two alliances of two teams each had to collect and deliver small Yellow and Purple Balls to a human player. The human player then had to throw the Balls into either a moving or fixed Goal. Additionally, a robot could pick up a large Yellow Ball and place it on top of the Goal in order to double the points from that Goal. Each small Ball had a number printed on it (either 5 or 10) which determined its points. Teams could also add fifty points by having their robot hang from a Pull-Up Bar.