Topless Tongan flag-bearer Pita Taufatofua makes his Winter Olympic debut on Friday in cross-country skiing, and it's fair to say that he's aiming low. "First step, finish before they turn the lights off, that's number one. Don't ski into a tree, that's number two." The 34-year-old became a social media sensation when he appeared at the Rio 2016 Olympics opening ceremony with his shirt off, his torso glistening in oil and wearing just a traditional ta'ovala mat round his waist. He then repeated the trick at last Friday's opening ceremony in Pyeongchang -- even as temperatures dipped well below zero -- brandishing the Tongan flag like a spear and becoming an online hit all over again. "I've had 12 weeks on snow in my whole life so on Friday I'll have close to 13 weeks on snow if the race takes me a week to finish... hopefully not, it would be a good story wouldn't it!"