In 1986, Peter Davies  was on holiday in Kenya after graduating from Northwestern University.    On a hike through the bush, he came across a young bull  elephant standing with one leg raised in the air.  The elephant  seemed distressed, so Peter approached it very carefully.    He got down on one knee, inspected the elephant's foot, and  found a large piece of wood deeply embedded in it.  As carefully  and as gently as he could, Peter worked the wood out with his knife,  after which the elephant gingerly put down its foot.  The elephant  turned to face the man, and with a rather curious look on its face,  stared at him for several tense moments.  Peter stood frozen,  thinking of nothing else but being trampled.  Eventually the  elephant trumpeted loudly, turned, and walked away.