Emily Eccles, 15, was left with just one centimetre of skin keeping her jaw attached to the rest of her head after she smashed into a gatepost while out riding near Baslow, in Derbyshire, in August.
Emily was taken to Sheffield Children's Hospital after finding herself on the floor, holding what remained of the bottom of her face in her own hands.
But consultant facial reconstructive surgeon Ricardo Mohammed-Ali rebuilt her face in a five-and-a-half hour long operation which was such a success that the teenager was back at school for the start of term, just a month after the accident.
She explained how she had been out riding with a friend and her family when her horse was spooked by an exhaust popping on a car.
The horse galloped along a country path but, after her feet came out of the stirrups and she fell to one side, her head hit a wooden post.
Emily said she remembers catching something red which flashed in front of her face as she fell.
"I just looked down and I was like, 'I don't know what that is'," she told the PA news agency.
She said that, once in the ambulance: "I just looked down and I could see teeth and bone and I said, 'is that my jaw?'."
Mr Mohammed-Ali pieced together Emily's face using three titanium plates, more than 160 stitches and managing to save all but one of her teeth.
Emily said she first tried not to look, but accidentally switched on her selfie camera as she was messaging a friend.
"It was like something you see in a film, it was really quite horrific," she said.
"At first I was thinking, I don't know what I'm going to do, I'm not going to look like me, I'm not going to have the same kind of life as I did before."
Now the teenager is thanking Mr Mohammed-Ali for a recovery her mother has called "miraculous".
"He said that in a year's time, from speaking distance, you won't even be able to tell that anything's happened," Emily said.
She said: "We can't thank him enough. Everything that he's done in his career up to that point led up to him being on call that night. If anything had gone any differently, I might not have had a bottom jaw."
Emily said she has written to the Queen to get the surgeon a knighthood and received a personal letter straight back from her secretary saying it had been referred to the relevant body.
"Saving people's lives and getting them back to normality definitely deserves some sort of recognition," she said.
Emily lives in a village just outside Sheffield with her teacher parents Michelle, 50, and Chris, 48; her brother Sam, 17, and their two dogs.
She said "I'm not a horse rider", but insisted: "I'd like to ride a horse again it's my parents I have to convince."
Mrs Eccles said she was "still thinking about it".
Mr Mohammed-Ali said: "It could have been worse, but it is one of the most significant injuries that I have seen in a child outside of areas of conflict."
He said: "Emily's injury was significant in that the entire left side of her lower jaw from the front of the jaw to the joint was pulled away from the face and only retained by a small strip of skin.
"The nerves that supply sensation to the lip and chin was torn on both sides. Branches of the facial nerve that move the muscles of the lower lip were severed on both sides. The lower part of Emily's face was only attached by a piece of skin."
He added: "I am extremely pleased with her recovery so far."
The family said they are determined to support The Children's Hospital Charity's fundraising to help improve the Emergency Department and provide a helipad above the hospital.
The air ambulance was called to Emily's accident but it was decided to go by road, partly because the helicopter currently has to land in a park opposite the building, her family said.