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"After Rio I needed a new challenge," he said. "Could I do a new sport, the hardest I could think of, in a year?
"Every time I ski I feel like I die a little inside. The burn starts and then you hold the burn for an hour or more.
"I still haven't had a race where I felt completely happy, in terms of no pain."
Taufatofua qualified for Pyeongchang at the seventh, and final, attempt.
He travelled to Isafjordur, Iceland, for a make-or-break race in mid-January and finished sixth.
"The closest I had got was within 30 points. This time I blew it out of the water, the best snow race I have ever done," he said.
There was one small problem. Having crowdfunded to support his target, Taufatofua had only been able to afford a one-way ticket.
He added: "Our tickets to Iceland were one-ways because that was all we could afford. I had to call my brother and ask him to get me a ticket."
Taufatofua, who ranked 11th in the +80kg in Rio, also plans to target a third Olympics in two years' time.
"I feel I have got unfinished business with taekwondo," he said.
"The goal at Rio was to win a medal, so Tokyo 2020 is on my radar.
"But who knows? You might see me in something else. I love all sports, it could be anything."
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