A sightseeing helicopter plunged to the ground and crash-landed on two tourists.
The spectators suffered head injuries, one more seriously, and were rushed to hospital.
In the footage, the yellow gyroplane was seen performing a low-altitude demonstration flight as part of a three-aircraft formation.
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It suddenly span wildly out of control and plummeted to the ground.
The victims watched in terror as the machine ploughed straight into them.
The crash happened at Chaka Sky No. 1 Scenic Area beside the salt lake in Qinghai Province, China, on Tuesday (21 Jul).
The tourists remained conscious on arrival at Ulan County People’s Hospital before transfer to a larger facility in Haixi Prefecture, as reported by Need To Know.
Officials from the Ulan County Joint Investigation Group said: “A self-rotating rotorcraft crash-landed, injuring two people on the ground.
“The victims were sent for medical treatment at the first opportunity.
“Their vital signs are currently stable.”
The group added that the aircraft has been seized and the scenic spot was closed while the cause is probed.
Early indications suggest wake turbulence from a nearby gyroplane may have triggered the loss of control.
The occupants of the Harbin XLI gyroplane, which can carry two or three people, escaped injury.
The investigation is ongoing.
