From Aesop's Fables :The Boys & the Frogs

Some mischievous boys were playing on the edge of a pond, they saw some frogs swimming about in the shallow water,they wanted to have some fun, they began throwing stones at them and they killed several of them. Finally one of the frogs stick his head out of the water and said ' Stop! Stop! can you stop?' This is a sport to you but not to us.