They've been on track to be the most winning team in Amazing Race history, but the good fortune that has been bestowed upon The Green Team all season could come to a crashing halt.

Denise & James Earl Reflect On Their Season

Justin and Diana have been winning legs and have been so far ahead of the other teams that no one has been able to take them down, even with three U-Turns-but when teams head to China, all bets could be off.

Naturally the other remaining teams-The Paparazzi (Logan and Chris), The Reporters (Kelsey and Joey) and The Cheerleaders *Tiffany and Krista)--wouldn't mind seeing the Green Team knocked down a peg or two, or even eliminated, and they could surprisingly get their wish.

Can The Green Team Win It All?

"If Justin and Diana get knocked out, none of us are going to cry about it," Joey says in the clip.

And while it's unclear what actually could cause unexpected problems for the team, it could be an unexpected mistake that costs them everything-the kind that has shockingly taken down strong teams before, like a lost passport. And if that happens, it genuinely will all be over for the most dominant team this season.

"They're done," Logan says in the clip.

"Yeah, it's over," Chris adds.

And of course, if the two do find themselves eliminated-it will be one of the worst things they could imagine for themselves.

"I'll never be able to get over it," Justin says with tears in his eyes.

The Amazing Race airs Fridays at 8 p.m. on CBS.

Tags: The Amazing Race CBS Reality TV