The longer version
Flyball is a dog sport in which two teams of dogs race each other over a set of hurdles on a 51 foot long course. At the end of the hurdles is a flyball box - a spring-loaded platform that launches a ball when triggered. The dog must quickly perform a box turn, jumping on the angled platform and pivoting, while catching the ball. The dog then returns over the jumps with the ball. Each team is made up of four dogs who run in a relay - once the first dog crosses the finish line, the second dog runs, and so forth. The first team who has all four dogs complete their run without error wins the race.