Victor Bryie, 27 of Winter Haven, Florida, had been attempting a Canopy Relative Work manoeuvre with another parachutist, Shaun Phillips, also 27 of the UK when the accident took place.
The crew manoeuvre is essentially when skydivers stack their parachutes.
Phillips told investigators both he and Bryie jumped at 14,000 feet. At 9,000 feet, Phillips was above Bryie and said Bryie came up under him too fast with an open chute. The parachute's lines entangled both men, WFLA-TV reported.
Phillips managed to get himself free at about 3,000 feet, but Bryie was spinning horizontally while fully wrapped in lines and his parachute was only partially open.
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Polk County Sheriff's Office investigators said the accident happened yesterday afternoon.
County officials found Bryie where he landed near a fence. Bryie was taken by helicopter to a hospital with broken bones and a head injury. He was in serious but stable condition last evening.