sea world

A wild dolphin in south Australia has been teaching members of her group to walk on their tails, a behavior usually seen only after training in captivity.

Scientists are scratching their heads -- why would the dolphins do this?

Well, one of the female dolphins, Billie, could have learned the behavior by observation during her brief stint in a dolphinarium.

Or they might be watching too much Olympic gymnastics. Plus, it just looks like fun.