Leonard: So, the guys and I were talking about renting a party bus and everyone going to Vegas.
Penny: Oh, that could be fun. But just to be clear, you mean a party bus with booze and music, right, not, like, juice boxes and video games?
Leonard: Yes. And Howard's birthday was a drop-off party. You didn't have to stay.

Sheldon: Woman, you are playing with forces beyond your ken.
Penny: Yeah, well your Ken can kiss my Barbie.

Raj: [to Amy] If you were having Sheldon's baby, would you really want him in the room?
Penny: Yeah, if he's in the room when they're making the baby, I'll give you $10.

Penny: I mean, who even reads Scientific American?
Leonard: It's kind of a big deal.
Penny: If it's such a big deal, how come the biggest celebrity they could get for the cover is a molecule?

Amy: Hi, Sheldon.
Sheldon: Hello.
Amy: Are you feeling any better?
Sheldon: Physically, yes, but I'm upset because everyone's mad at me for no good reason.
Amy: Why don't you tell me what happened, and in a gentle, loving way, I'll explain to you why you're wrong.

Sheldon: Good. Then I'll be leaving now.
Emily: Oh, it's okay, Sheldon. Come with us.
Sheldon: Oh, that's very kind of you. But I'm sure you'll all have a better time without me. Let's go, Stuart.
Stuart: But I want to stay.
Sheldon: Stuart, now!

Sheldon: Raj, you were being a good friend, and my illness was no excuse for my behavior. I hope that you can accept my apology.
Raj: Of course I do.
Sheldon: And, Emily, I'm sorry for saying dermatologists aren't real doctors. And I'm sure you're tired of hearing that.
Emily: Do you honestly think I hear that a lot?
Sheldon: Well, I would imagine when your job is popping zits and squirting Botox into old lady faces-
Raj: Okay! Okay, the point is that we accept your apology.
Emily: Uh, maybe you do. He just insulted me again.
Raj: Yeah, but he doesn't mean it.
Emily: Why are you defending him?
Sheldon: I believe I can answer that. Uh, like me, Raj is demonstrating empathy.
Now, why don't you accept my apology, receive your free T-shirt, uh-- I hope extra small is okay. For some reason Wolowitz took a medium.