Finally, the second finish. It is official. Sometimes the real-time results stand. Other times they are shuffled. There are cheers and groans, again, and often shock, and occasionally hugs and tears.

In short-track speedskating, the races are fast. The reviews are slow. That is especially true at the Olympics, where getting calls right is the ultimate premium. Nearly every race in which athletes bump or fall down — that is most of them — ends, and then starts again on the screen.

There may be no sport anywhere with such a dire need for replay reviews, nor one that uses it so often and for so long, which is just how the sport wants it.

“There’s so much happening in short track, and everything happens so fast, and they’re watching anywhere from four to eight athletes at a time,” said Derrick Campbell, coach of the powerful Canadian team. “The coaches and the athletes appreciate it because it’s such a big event. So if they go to the video too much, or spend too much time, that’s a good thing. We want them to be sure of the calls.”

That was before the highly controversial end to the women’s 3,000-meter relay on Tuesday night. South Korea, China and Canada, all powers and fierce rivals, were in the finals with Italy. There was jostling and nudging throughout. During a crowded relay exchange where one teammate leaving the ice pushes another for the next leg — the sport’s version of passing the baton — South Korean and Chinese skaters collided and fell.