This is the challenge card awarded for "not going off the track in EXPERT difficulty in Arcade mode and winning the race".
It's really not specific enough. What is "the track"? Do curbs count as the track? What is "off the track"; one wheel off, two wheels off? Or is one wheel kept on the track considered to be still on the track?
It's really not specific enough. What is "the track"? Do curbs count as the track? What is "off the track"; one wheel off, two wheels off? Or is one wheel kept on the track considered to be still on the track?