zomba retreats across the savannah, for the moment.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. posing a serious threat to robert and mark's safety. >> they weigh 200 pounds when they're born, and this was eight months of good food and lots of mom's milk. >> we could not get in there, so our option was to use the ropes. >> their plan is to harness the calf with a rope attached to the jeep and pull. the calf has been in the well for hours and is exhausted. its mother is still nearby, so a quick rescue is essential. the calf has stirred up mud, and the sides of the pit are e