Transcript for Skydiver's Helmet Cam Captures Horrifying Free-Fall
Humans have long had a passion to fly. Perhaps that's what fuels the booming business of sky diving. But even seasoned divers can make mistakes. And then 90 seconds might mean the difference between life and death. You're about to see what happens when a person's fate is literally up in the air. My co-anchor Dan Harris with the times of crisis and the spectacular saves. Reporter: The video starts with a group of sky divers climbing on to the outside of a plane preparing to jump. The small camera recording this video is attached to the helmet of an experienced 25-year-old sky diver named James lee. He's done this thousands of times. But never before has this happened to him. Seconds after he leap, a freak accident. One of his fellow diver's legs hits lee in the back of the head knocking him out. The camera goes wobbly as lee tumbles unconscious from 12,500 feet, hurdling at an approximate speed of 120 miles an hour towards certain death. Look at what happens next, though. About 30 seconds into the dive, his friends notice there's something wrong with him. They approach giving him hand signals to check if he's okay. Seeing that he's not, they attempt to reorient his body to the correct position so they can deploy his chute. But they only have maybe 60 to 90 seconds to do so before it's too late. At the 58-second America, bingo, it works. You can hear the hiss of the air relent as lee's descent lows down. It's pretty incredible when someone is unconscious and tumbling, it's virtually impossible to catch them. Reporter: This is not the first sky diving mishap to make news of late. This week, a 16-year-old making a hard landing in Oklahoma after her chute failed. Just had a first-time jumper get hurt out here. Is she okay? No, she's not. She's on the ground moaning. Reporter: Her father saying it's a miracle she survived. She jumped out of a plane but she fell in god's hands. In 2005, a pregnant woman crashing down after her chute malfunctioned. She also survived. And then there was the case of Laverne Everett. I just turned 80. Happy birthday. Sky diving. Her safety harness came loose. She dangles, holding on to her instructor for dear life.
This transcript has been automatically generated and may not be 100% accurate.