AlamyA student fell to her death at Seven Sisters whilst posing for photos
Ms Hyewon, who had come to London from South Korea to improve her English, suffered fatal head injuries.
Detective Sergeant Tod Stewart from Sussex police told the inquest in Eastbourne: "There were six photos of her close to the cliffs. They were showing her jumping in the air extremely close to the edge.
"Her concentration is not on anything other than what she is doing. The expression on her face shows nothing but enjoyment."
Senior coroner Alan Craze said: "She landed with one foot beyond the cliff edge and only her other foot landing on the cliff edge.
AlamyCoroner Alan Craze recorded a verdict of misadventure regarding the death of Hyewon Kim
"Every one of the photos shows her looking away from the cliff edge. A lot of South East Asians like to visit because the Seven Sisters refer to the seven daughters of the Chinese deity, the Jade Emperor.
"If people do things which put them in extreme and obvious danger, there is a limit to which they can be stopped."
A statement by witness Young Choi, 24, said: "I went to the Seven Sisters for tourism. Another Korean girl, who I did not know, was there and she asked me to take photos.
"As I was taking photos, she fell down. We all tried to find someone to call 999.
AlamyStudent Hyewon Kim had come to London to improve her English
"After the 999 call, I called the Korean Embassy."
Jin Gyeong Jang, another witness, said: "I saw her standing then heard sound of a bang, then she was not there. At the space where she was standing, there was just a bag."
Fireman Richard Harrison revealed what he saw when he attended the scene.
He said: "We discovered the body of a young female, face down. I estimated the cliffs to be between 150 to 200ft high."
AlamyStudent Hyewon Kim came to Britain to improve her English
A post-mortem examination concluded that Miss Kim died from catastrophic head injuries on June 22.
Mr Craze recorded a verdict of misadventure.
Speaking after the inquest, Mark Webb from East Sussex Fire and Rescue Service, said: "This was an incredibly sad incident leading to the unnecessary loss of a very young life.
"What we would say is to urge people to stay well away from cliff edges.
"The day before this incident we had a very severe rock fall in the same sort of area, so it's clear some of these cliff edges can be very unstable."
The death came just a day after another tourist was injured in a similar fall nearby.