. ♪ >>> jerry loman, a banker from the midwest, was hoping for the trip of a lifetime when he bookedvacation to south africa. when he finds himself under water without oxygen fighting fiercely with a five-ton great white shark, he knows he's one head thrash away from death. suddenly, he sees an opening and somehow he manages to escape the wrath of the great white. but as soon as he finds himself in open water, he realizes he's not out of danger yet. his lungs are burning for air. he can see the surface, but he just can't get there. >> i start falling and forgetting that i had 10 to 12 kilos of weight on me. because there was a big, strong current there and i needed to be weighted down. >> with 10 to 12 kilos or 25 pounds shoving him under water, he manages to the grab the bars of the cage. >> i need to get out of the water. there's not a regulator in my mouth and other sharks around. >> he climbs up the cage, emerges from the water and finally, the air his body is craving. >> they throw me into the boat and i remember just laying face down for a couple of minutes just going, did this