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 smelled the blood and began
 hassling him about where he got it.
 
 He told them to go away and let him get some sleep but they
 persisted until finally he gave in. "OK, 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 he slowed down and all the other
 bats excitedly milled around him.
 
 "Now, do you see that tree over there?" he asked.
 
 "Yes, Yes, Yes!" the bats all screamed in a frenzy.
 
 Good" said the bat, "Because I sure as hell didn't!"