Seal Ball
You came across a pack of hunters trying to catch two seals and sell them for leather, meat and fat. You decided to help the poor seals and told the hunters, that it is very unwise to kill such intelligent creatures. It is much more profitable to sell them to the circus. Now, the seals have to compete against each other playing volleyball. The one which proves more intelligent and agile by winning, will be sold to the circus, and, as all animals there - will suffer terribly, but hey- that's still better, than dying instantly, isn't it?