kim wilder is a filmmaker that documented wildlife. he spotted a very rare and aggressive black rhino. kim wants to get the shot. so he is going to get as close as possible. you see that the rhino has noticed kim and right here is where things get really tense. >> oh, boy. >> instead of running, he stops, faces the rhino directly and stands his ground. >> the rhino stands his ground too, charging at kim a number of times. >> you won't believe what sends the rhino running. >> wow. that's why human beings are at the top of the food chain. >> this is part of a two-hour special on discovery called, man, cheetah, wild. kim lived with a family of cheetahs for a year and a half investigating how this mother cheetah brought her cubs up. in this second video, that's an exclusive to "right this minute." we get to see one of the interactions that kim gets to have with the cubs and it's nothing short of amazing, because, cheetah mothers are known to be very protective of their cubs. before you know it, the cubs are walking up toward him and they s