SPOILERS:
A group of people live on a floating platform, where they fish. But there is a trick to it, they have to mantain complete balance with each other or else they'll fall from the platform. One day one of them catches a music box with his fishing rod. Then in an effort to sample the sound it makes the men accomplish difficult and dangerous tasks of balance. In the end one's own selfishness kills the others and leaves him alone and without the music box.
END SPOILERS

The short is an example of how selfishness can drive you apart from other people, and it also comes to show it will eventually leave you without your the things you so desperatly wanted for yourself.
I give it 3 stars because it has good stop-motion animation and leaves you thinking.