The Crow and the Oyster

A crow found an oyster on the sea bank. He tried to break its shell, but it didn't open. He then threw a stone at the oyster, but nothing happened. 

"My friend, the oyster won't open this way," said a cunning crow to the first. "Take my advice: fly high up in the sky with the oyster in your beak and release it upon a rock. Only then will it break."

The first crow liked this idea and implemented it. It caught the oyster in its beak, flew high, and released it. The oyster shell broke instantly, but the cunning crow immediately picked it up and ate the meat inside. When the first crow reached where the oyster had landed, all it could find was the empty, broken shell.