One day a big tortoise, a middle sized tortoise and a small tortoise went into a cafe.
They ordered three banana splits. While they were waiting they noticed it had begun to rain.
"Look at that," said the big tortoise, "we should have brought our umbrella."
"You're right," said the middle tortoise. "Let's send the little one back to get it."
"I'll go," said the little one. "But only if you promise not to eat my banana split."
The big tortoise and the middle tortoise promised.
A few days later the big tortoise said to the middle tortoise,
"Come on, let's eat his banana spilt any way."
"All right," said the middle tortoise.
At that moment the little tortoise shouted from the end of the cafe,
"You do that and I won't get your umbrella!"