Parking garage. Night. The Warblers come walking across the concrete floor, where they are met by Blaine and Santana in hoodies. They've invited the Warblers there for a Jackson-off, winner take all. Sebastian insults their public school math skills for thinking the two of them can take on the mighty Warbler Army when Auntie Snix snaps her fingers and the rest of New Directions joins them. And then the Warblers start singing the backup for "Bad," while New Directions (mostly Artie, Blaine, and Santana) gets the actual lyrics. And there's all kinds of super-nelly, sub-West Side Story fight-dancing. New Directions singing the actual song while the Warblers sing the instrumental bits doesn't seem like a very fair competition. Anyway, while they're singing and dancing, the Warblers are passing a paper bag around. As the song finishes, Sebastian reaches into the bag and pulls out a Slushy, which he proceeds to throw in Blaine's face. Causing Blaine to drop to the ground and scream like a baby while the Warblers walk away. Commercials.
Music room. Kurt enters to tell the kids that Blaine's cornea is deeply scratched, and he's going to require surgery. Will is shocked, since he's never known of a Slushy causing that kind of damage. Finn thinks it's because Sebastian put something in the Slushy, but Will tells him that without evidence, an accusation like that won't really get them anywhere. He also tells us that he and Maharishi Figgins spoke with Dalton's headmaster, and he's opening an investigation. Will wants the kids to sit back and let the system deal with Sebastian. Artie thinks that isn't good enough, so he has a fantasy in which he and Mike Chang dance and sing "Scream." Two observations. First, it's kind of sad that the second best male dancer on this show so rarely gets to show his stuff. Second, Mike Chang is really rocking the guyliner. (The vinyl pants don't hurt.) So, Will tells Artie to take a break from glee until he gets his anger under control. Unless maybe that was part of Artie's fantasy. Who can tell?
The Novak. Rachel enters and nervously tells Quinn that she needs advice about "an adult problem." Quinn immediately worries that Rachel's pregnant, but Rachel tells her that's not the problem. Quinn agrees to keep whatever it is a secret, so Rachel drops the bomb on Quinn that the guy who broke up with her twice to date Rachel has proposed to her. Quinn, apparently in the "good sense" part of her neurological cycle, tells her that she can't say yes. Rachel points out that plenty of people their age get married. Yes, plenty of stupid people. (Dear Angry Letter Writers: I don't care if everything worked out great for you. Getting married at 18 is not a smart idea.) Quinn responds by handing Rachel a letter -- it's Quinn's acceptance to Yale. Quinn's point in handing the letter to Rachel is this: "I've dated Finn, Puck, Sam. Even thought I loved some of them. But by the time the snow falls in New Haven next winter, I won't know why." Rachel asks if Quinn is suggesting that she break up with Finn. Quinn tells her that there's nothing wrong with making the best of the next few months, but that she shouldn't want to drag "an anchor from the past" into her amazing future. Look, Finn's gotten a little puffy, but I don't think he's heavy enough to hold a ship in place. She thinks that if Rachel really wants to be happy, she's going to have to say goodbye.