With that, the challenge begins. J.T., Stephen, and Douche are given the length of the challenge to eat as much as they can, and they dig right in. Sierra goes first, and the rainy surface of the board slows her puck down quite a bit. Debbie gets closer, but not that close. Probst advises the contestants to "use that cold energy, that shiver," which is stupid and doesn't make sense. Taj overshoots the X, as does Erinn. Tyson goes last, and his challenge magic doesn't work this round as he ends up further away from the X than Debbie.
Second round: Debbie gets the closest to the X. Taj knocks Tyson's first puck closest to the X, which sucks hard. But then Erinn gets the closet so far with her turn. Tyson doesn't get close at all, but Probst tries to credit him for blocking the path to the X for future turns. Actually, it's not a bad plan (if it was intentional, which I doubt), as when Sierra goes, she ends up knocking into Tyson's second puck and sliding it very close to the X. Shit.
Third round: Taj's puck goes into the fake sand dune. Fail. She mutters that she should have eaten the pizza. Yeah, but then you'd look like an asshole who's way too confident about her position in the game. Erinn goes next and slides her puck hard to knock Sierra out of the way, as if she was even close to the X to begin with. Tyson's up next, and his last shot gets closest to the X. Ugh. Douche cheers for him obnoxiously with his mouth full of food. And now, it's Sierra's turn. WHAT!!!! Not only does she get closest to the X, but she knocks both of Tyson's pucks away, too! YES!!!!!!!! She's thrilled, and she's the only one. Debbie tries to look happy for her. Shut up, Debbie. Douche interviews that when he saw Sierra dancing in victory, it occurred to him that he might have fucked up and shouldn't have gone for the pizza after all. But if they're showing him saying that post-challenge, then it probably means that someone knocked Sierra away and she lost, because Douche wouldn't admit to a mistake that had any real consequences. Debbie is the last person to go, and Sierra can't even look. Debbie slides ... and, oh fuck. She knocks Sierra away and wins immunity. Sierra actually looks happy, which is strange. Maybe she wants to leave the game at this point. Probst gives Debbie the necklace and tries to pretend that we don't all know who's going home tonight. Sierra does the post-game wrap-up that she knows she needed to win, and she didn't. So she's praying for a miracle. Too bad. Douche exists, therefore there is no god.