An elephant drinking from a stream saw a tortoise lounging in the sunshine on the shore.

The elephant strode over, grabbed it with his trunk, and flung it into the jungle.

A passing zebra asked, “Why did you do that?”

“Forty years ago that very tortoise nipped my tail just for fun,” the elephant said.

“Wow, forty years ago," the Zebra said "How did you remember that?”

“I have turtle recall,” replied the elephant.