because he's not responding. >> at the bottom of the wall of rock, eric comes to. >> i looked at my hands, saw a bloody mess, checked myself out, immediately stood up. >> and it dawns on him, amazingly, he's still alive. >> i knew i had just been part of a miracle. modern day miracle caught on tape. >> david now has to rappel to his friend in the canyon below. >> i asked him what happened, you okay? he just shows me his hands and his hands were just all blistery, all meaty. >> i knew i had just survived a fall that i should not have survived. >> and now there's only one way out of the canyon. >> i'm a little shocked still, but we're carrying on. >> he's a trouper. >> it was another ten hours out of there, ten more rappels, more swimming to get out at this point.