us. they know we're not a threat to them, so we don't break that kind of position lightly, but when you do break it, you have to make sure you do it in a convincing way. so i was behaving very, very strangely, and she didn't like that. >> vicki's tactic works. zomba retreats across the savannah, for the moment. a co-worker in the second jeep blocks zomba from returning, while vicki drives back to the well. her colleagues, robert and mark, get out of the jeep. vicki stays at the wheel where she keeps the videocamera recording and a watchful eye on zomba in case the group is forced to make a hasty retreat. >> if somehow the mother get back and find us there, out of the car, struggling with the calf, i don't know what would have happened. it would have been really, really, really dangerous. >> the calf is eight months old and enormous.