The Grind. Callie and Meredith are sweating it, as Handsy's BP is dropping. Just in time, his brothers say they're finished. Mere just needs to wrench one thing free and then his arm's all theirs. The doctors do their thing, removing the grinder, at which point a couple fingers drop out of the machine. At which point Mario and Luigi also drop to the floor. Happy-funny music is playing, which I never quite get in these kinds of scenes. Those hospital floors aren't padded. All this pratfalling by squeamish loved ones and harried dads-to-be has to result in a few head injuries, right? Sigh, whatever, overthinking it. Mere picks up a mangled, severed finger and asks Callie if it can be saved. From the way Callie's gritting her teeth when she says, "I don't know, CAN IT?" My guess is no, but let's check in later and see.

Amelia's on her eighth attempt at simulating the catheter procedure, and she can't seem to get it done under 97 seconds. She's frustrated and pissed. Lexie suggests taking a break, getting something to eat. Amelia's all, "I want something, but it isn't food." DRUGS DRUGS YOU GUYS SHE MEANS DRUGS. Lexie suggest something slightly less intoxicating, though I guess maybe not to a doctor: Hey let's go gawk at this guy who mangled his hand in a meat grinder! I kinda like Lexie and Amelia together. Like when Willow came to Angel and she and Fred palled around. Only Willow wasn't the only character on her show worth a damn, and also no lesbian tension in this one.

Morgan/Megan is still not looking very good as Altman comes in to see her. She informs Morgan that she has a myocardial infarction (heart attack -- I know things!) which caused a spontaneous coronary artery dissection, which is bad (know things!). When Arizona arrives, Morgan starts to freak out, because Arizona wouldn't be there unless something was wrong with the baby. Altman explains that they'll need to operate immediately, and since she'll need to be put on bypass, the baby has to be delivered now. Morgan fully freaks -- at moments like these, you realize the futility of metaphors like "has a heart attack" or "has a baby" -- while Arizona tries to calm her, bringing up her own experience with her own premature baby. As she's wheeled into the OR, she asks Alex to call her boyfriend, who's in her phone contacts. Arizona shoves Alex out of the room -- he wants to scrub in, but obviously not -- and when he asks her to confirm that the girl's name is Megan, Arizona's righteous snarl as she corrects him is so wonderful. Alex flashes his best "I'm a damaged little boy" frown as we head into break.