Seconds after leaping from a plane over Wiltshire, England, James Lee was hit on the back of the head by another skydiver.
"The blow knocked him out," the Telegraph reported, "and sent him hurtling towards the ground uncontrollably. Luckily two other skydivers noticed something was wrong and chased after their unconscious colleague."
Lee's helmet camera records the whole thing.
He is chased by his fellow skydivers, and when he can't respond to their hand signals, they take charge, quickly and coolly deploying his chute and moving out of the way. All 12,500 feet above ground.
Lee, 25, didn't start to regain consciousness until he was under the canopy. "He landed safely on the ground with no memory of the drama that had unfolded seconds earlier," the Telegraph reports.
But, big question, will he make another jump, his 1051st?
"I've been skydiving for five years and this was my 1,050th jump," he told the Daily Telegraph. "I'm very glad that everything unfolded how it did. I think my mum and girlfriend are more relieved than I am." And, yes. He said he'll jump again.