We return to Addison quizzing Mere on their patient: "Define T.T.T.S.?" Mere says it's twin-twin transfusion syndrome, which is conjoined fetal twins connected by blood vessels in the placenta. Addison: "Meaning?" Mere doesn't know. Addison says it means that one twin gets too much blood, and the other too little, endangering the lives of both. She adds, "I'd expect you to know that, Grey." Oops. The mother of the twins says she thought there wasn't much chance that anything could be done. Addison assures her that she's one of a handful of surgeons in the world who can separate fetal blood vessels, and they'll do surgery tomorrow. She tells the patient to ask Dr. Grey if she has any questions, as she's one of the hospital's most popular interns. Whoa. She also tells Mere out in the hall that she's actually this tough on all her interns, not just the ones who are sleeping with her husband. The mother of the twins overhears this, and rubs her belly in concern.

George grabs the chart of the patient Bailey assigned him, and realizes that -- surprise! -- it's Chief Webber. He walks in all business and starts checking Webber's pupils. Webber swats his hand away: "O'Malley. You're touching me." George doesn't know what to do, so he just stands there while Webber tells him that, as long as he's in this hospital room, he doesn't know what's happening outside it. He orders George to be his eyes and ears today. "I want you to be a sponge. You report anything and everything happening in this hospital to me." George: "I'm an investigative sponge?" Hee. Webber says yes, yes he is.

George walks out of Webber's room and promptly overhears McDreamy and Burke arguing about giving Meredith to Addison. Burke says he knows what he's doing, and asks if he needs something. McDreamy asks if he's ever attempted a standstill surgery. Burke is intrigued, and we cut to...

...Joe's room, where they're explaining that what they're going to do is cool his body enough to stop his heart, then try to fix the aneurysm. The being dead part is supposed to reduce the risk of rupture. McDreamy will have forty-five minutes to perform the surgery, and then Burke will step in and get his heart re-started. Poor Joe is like, "You wanna freeze my body, drain my blood, and stop my heart? In under forty-five minutes? If you go over, is it free?" Hee. Humorless Cristina is all, "No. Not free." Burke tells her to go prep the OR. Joe asks how much something like this costs. McDreamy tells him not to worry about that right now. Joe is worried, though, because he doesn't have any insurance, so he needs a number. The doctors have to break it to him that it will be a couple hundred thousand...at least. George, by the way, has been sponging this whole scene right up.