At the Winter Olympics in PyeongChang, South Korea,... the host country is on course for an outstanding result in men's skeleton -- the event where athletes slide down a track on a tiny sled at speeds of over 130 kilometers an hour.
On Thursday, the men finished their second of four heats.
South Korea's Yun Sung-bin, in the first heat, set a new track record... and then beat that record in the second heat.
Yun finished his best run with a time of 50-point-0-7 seconds,... and in both heats was about point-3 seconds ahead of his closest rival.
In fact, Yun had the biggest lead of anyone in the top 25.
Another Korean has also done well in skeleton -- Kim Ji-soo.
Kim came fourth in the first heat and sixth in the second heat.
The final two heats, which will determine the medals, will be held Friday morning.