VIDEO: Skydiver knocked unconscious at 12,000 feet rescued by friends

When James Lee was knocked unconscious 12,000 feet above the ground, his friends dived to save him. His free fall and the amazing rescue were caught on video by his helmet cam.

As the video starts, you can see a group climb to the outside of a plane over the English countryside.

Seconds after Lee leaps, a fellow diver's leg hits him in the back of the head, knocking him out. You can see his arms go limp.

That's when Lee's friends notice something is wrong.

They approach Lee and try hand signals to communicate with him. When there is no response, they reorient his body to the correct position and release his chute.

Objects fall at an average rate of 120 mph, known as terminal velocity.

"When somebody's unconscious and tumbling, it's virtually impossible to catch them," said Ed Scott, Executive Director of United States Parachutes Association.

Lee, 25, is an experienced skydiver who has jumped over 1,000 times, ABC reported.

Lee vows he won't let this accident stop him from jumping again.

See the video of his midair rescue below.  Mobile users can watch the video here:

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