. >> ae smack in the midd of the ke iuganda searching f f hippos. when all o of a sudden, -- oh, what's this right here? righghnext to thboat? they ca sw fast. he emerges from the water and wheels arod toace us. doesn't look happy to see us. so ee hippo that swamclclose to e boat there, you think that was the dodominant m male sayin awaway? >> that t seems toto be a a mal. trying to protect his brood. >> the hippo is one e of if t the momost aresse animals s on earth. it'said that hippos k kilill mo humans every year than any other mammal. so a hippo can cucut a huhumang into two pieieces? >> yes, he c can. >> two pieces, clean cut? ? >> if he g gets you rothe middle, he can c youou in two.. >> ourur guiuide, a grizzled hi watcher named peter says a hippo arrived. woman a a week before lookt him yawnwning. >> u see,he's mocking and scaring em away. >>>> deite theheir fociousness, hipposre desesperatelyly cam shy. ery time we roroll up p on a grp of thewhic is called a school, , they either diveeunde the wateranand then peer r out waririly or thigh l