Marissa approaches Derek and asks if she can see Danny, even though his parents won't be there for a couple more hours. It's all he can take, and he sits her down. After a moment, where her face begins to crumble as she senses bad news, he tells her that when he removed the pencil, Danny's artery burst and his brain had nowhere to go. Marissa falls apart, and Derek just holds her and rubs her back as her classmates look on curiously. On paper this might sound a little bit inappropriate, but in actuality, it was incredibly sweet and tremendously heartbreaking.
Meredith walks into the lounge where Cristina is waiting, and happily tells her that she's getting two cups of coffee -- one for her, and one for her dad. Cristina is drumming her fingers and seems not to hear any of it until Mere asks what's wrong. She explains that Hahn is doing a pulmonary embolectomy right then, but Cristina's trying to back off, so she's sitting there doing nothing so that she's not a brown-noser. Mere is rather confused and says it's fine to let this one slide and when Cristina erupts that she doesn't know how to do that, Mere says it's just like cutting a class. Cristina just turns and looks at her while Mere realizes that Cristina never cut a class. Chalk that up to just another one of the many ways Cristina Yang and I are very different people. (Hi Mom! I mean, I never skipped a single class ever, especially not because it was raining and I wanted to stay in and watch General Hospital, ever!)
Hahn spouts a lot of medicalese, which seems to mean that this was a big problem that will need extra work; Bailey angrily tells her she should have taken the problem more seriously and ordered more tests. Hahn concedes that, but adds, "Or maybe you should have. And if you weren't so busy flirting with the patient like a lovesick teenager, maybe you would have."
Anna/Kim and The Other One Whose Dad Looks Like Sloane are standing in the doorway to Danny's room, talking about how sad it is and how one of them had algebra with him. "I think." Marissa is sitting silently, and Izzie rolls her eyes and then approaches her and gently tells her that she'll get through it; Danny would have wanted that. Marissa shoots back that Izzie doesn't know that, since she's a prom queen just like them (at the door) pretending to know what it's like. Izzie says she wasn't a prom queen. "I was the girl in the cheap clothes from the trailer park who got pregnant, and got thrown in the pregnant girls' class, and none of the mothers would let their kids hang out with me. But I got through it. You will get through this." Lexie looks up, stunned to hear that Izzie wasn't like her. Anna then says she's going to write a letter to his parents, which The Other One comments is "beautiful," and Izzie finally sends them packing since they don't know him. I've got to say, all of these depictions of high-schoolers are scarily spot-on, from the life and death "drama," to the copious amounts of concealer used on chin zits, to the gross displays at someone else's tragedy. Marissa apologizes, but Izzie stops her, saying Marissa just lost her best friend. "It's the worst thing in the world." Yes, as Izzie knows so well, because she and George having bad sex is just like Danny basically dying in a freak accident. Some of this story works, but aspects like that really are stretching things a bit.