A vampire bat came flapping in from the night covered in fresh blood and parked himself on the roof of the cave to get some sleep.
Pretty soon all the other bats in the cave smelt the blood and began hassling him about where he got it. He told them to bugger off and let him get some sleep, but they persisted until he finally gave them a response.
“Okay, follow me,” he said, and flew out of the cave with hundreds of bats behind him.
Down through the valley they went, across a river and into a forest full of trees.
Finally the bat slowed down and all the other bats milled excitedly around him.
“Now, you see that tree over there?” he asked.
“Yes! Yes, yes!” the other bats all responded eagerly.
“Great!” said the first bat. “I bloody didn’t!”