So there's this gif.
https://pbs.twimg.com/tweet_video/CS0t5pnUcAA7Qci.mp4
The announcers said that since Hoogland went backwards so that he could take the lead, rather than to give up the lead, that the going-backwards wasn't labeled a violation.
I scanned the rulebook but couldn't find the rule about how you can only go forwards. Anybody what that rule states?