Meredith: [voiceover] At any given moment, the brain has 14 billion neurons firing at a speed of 450 miles per hour. We don’t have control over most of them. When we get a chill...goose bumps. When we get excited...adrenaline. The body naturally follows its impulses, which I think is part of what makes it so hard for us to control ours. Of course, sometimes we have impulses we would rather not control, that we later wish we had.

[After they catch Cristina on top of Burke with just her bra and panties on]

Burke: [shocked] Mama. Daddy.

Cristina: [while she gets off of him and grabs the blanket] Mama, and daddy?!

Jane Burke: Preston, is this a new service that the hospital is providing?

Cristina: Benjamin O'Leary, 32, in for the removal of a brain tumor that's pressing on his temporal frontal lobe. Clearly it's effecting his impulse control.

Benjamin: It makes me say everything I think. Which apparently is annoying. This doctor looks annoyed anyway. Although it's hard to tell cause she always has a pinched uptight look on her face. Am I annoying you?

Cristina: It's fine.

Ruthie: You can't say it's fine. He doesn't preceive sarcasm or irony. If he's annoying you, you have to tell him.

Benjamin: Maybe I'm not annoying her Ruthie.

Cristina: No, you are.

Bailey: Doctor Yang!

Cristina: He asked!

Derek: Okay Benjamin, Doctor Yang, as pinched and annoyed as she might be, is going to prep you for surgery today. Do you have any questions for me?

Benjamin: [about Meredith] Is that blonde your girlfriend? 'Cause the way you keep looking at her, you might as well just mount her right here, right now. [Derek and the interns are trying not to laugh.] I'm sorry was I rude?

Bailey: [angry] I'm proud of you all. You make me proud. You reflect on me well. Grey, if you think you can keep your clothes on long enough to follow up the labs I will appreciate it.

Alex: The pit? I’m off gynie?

Bailey: Doctor Montgomery-Shepherd is out sick. You can cover the pit or you can… [notices the bulletin board] You can tell me who's damn panties are on the bulletin board! [Alex and George laugh]

Cristina: [whispers to Meredith] Yours?

Bailey: This is a hospital people, serious work happens here. We save lives here--[to Alex] Oh, something funny? [Alex shakes his head] Whose are these?

Meredith: [whispers to Cristina] This is bad, this isn't good.

Cristina: [whispers to Meredith] You better claim them. She thinks they are mine. Claim them!

Meredith: [whispers to Cristina] No!

Bailey: [looking at Meredith and Cristina] I know it's one of you. It's always one of mine. Always. So tell me, which one of you left your damn drawers on my surgical floor?!

Bailey: All four of you, do not make me regret setting you loose in this hospital. Please do not make me regret letting you loose in this hospital. O'Malley, what do I mean by this?

George: You mean check with you before we cut any wires or steal any hearts?

Alex: So, you and O'Malley, huh? How'd that happen?

Callie: I don't know, you're a surgeon, how'd that happen?

Cristina: His mother rivals my mother and that's saying something. Both of them, dark and evil.

Meredith: I'm missing dirty stripper Cristina. She was fun and less angry.

Cristina: Next time she even looks at me sideways, I’m telling her what I think. She wants to call me a racist. Yeah, okay? I’ll call her a sexist. Change my career after I’m married. What is this, 1953? If she comes at me, I’m going there.

Meredith: I think you should. I think we should all just go there. You know, tell the truth, spit it out, go with your gut, follow your instincts.

Cristina: I miss philandering whore Meredith. She was trashy, and much less idyllic.

[at Joes]

Addison: Dr. Stevens!

Izzie: Please don't call me doctor.

Addison: Oookay, please don't call me Mrs. Shepherd! Haaaa! That's funny.

Izzie: She's drunk.

Joe: This is true.

Addison: Did you know about the slutty sex your slutty friend had with my super slutty husband?

Izzie: You should have a muffin. They're really good and they help you.

Addison: I may be beyond help.

Izzie: Yeah, me too.

Meredith: [voiceover] The body is a slave to it's impulses. But the thing that makes us human is what we can control. After the storm, after the rush, after the heat of the moment has passed, we can cool off and clean up the messes we made. We can try to let go of what was. Then again...