https://www.youtube.com/watch?v=H6FEFWgvHqw 
4 players (1 on each color) jump into the ring and attach themselves to the bungee cord. All of the balls are in the middle of the ring. When the operator blows the whistle each "hippo" (person) must "chomp" (grab) the balls and bring them back to the basket one at a time in their corner. When the operator blows the whistle or all balls are gone from the middle, the player with the most balls wins the game. Very fun to play and even more fun to watch!
