Roy and Cristina have already fallen into their old pattern of him trying to get any sort of reaction out of her while she stays totally straight-faced, in this case informing him that no joke that starts with two animals walking into a bar is ever funny. Roy wants her to humor him, and finally admits that he's nervous about getting new lungs and also about seeing his daughter -- the latter possibly making him more nervous than the former. As Cristina gamely tells him to just look at it as getting rid of his crappy lungs, his daughter Corrine walks up to the door. Poor Amber Benson. I'm sure she's a lovely girl but whenever I see her I think, oh, it's sad sack Tara from Buffy again. My friend Jessica in fact nailed it -- she's like the female version of Paul Giamatti -- someone who always shows up and mopes their way through whatever sad-sack role they are playing that day. She greets her dad as "Roy" and immediately gets snotty when he asks how she's been, but when she apologizes he assures her he loves her snark, and that she got that from him. It's sad how nervous he is and how much he clearly wants things to be right between them. But he doesn't have a chance, because suddenly he can't breathe, and a bunch of nurses run in with a crash cart and start doing compressions. Cristina is totally wigged out and just stands back, and when Corrine sees her she yells at her to do something. Cristina, though, just stands there while the nurses work.
Cristina has finally started doing her job in the form of an ultrasound, and she tells a worried Corrine that his lungs are putting extra pressure on his heart, which she grudgingly admits means his heart is now failing and it's bad enough that he might need a new one. Corrine is aghast, but as Cristina has given her this news she won't look the other woman in the face, and finally has a nurse take over so that she can go and call Teddy to give her an update. She manages to get out of the room never looking directly at Corrine.
Mark, in a moment away from his butt-building duties, tries to engage Bailey about a bon voyage party he's throwing for Callie and Arizona in the lounge that evening. She's not terribly interested since she's late for an autopsy, and when Mark tells her that Teddy had to go pick up lungs instead of cupcakes as planned, she finds herself even less interested. After she asks him if he wants her to go to the bakery or bake them herself Mark sizes her up and realizes this is not a battle he should even start, much less fight, and she marches off. Lexie comes up to talk about their patient but Mark first decides to stick her on cupcake duty instead.