Raj: His only options here are to fake a heart attack or have a real one.

Howard: My arm is feeling numb. *Howard rubs his right arm*
Bernadette: That's the wrong arm for a heart-attack, doofus.
*Howard switches to his left arm*

Sheldon: If it makes you feel any better, Amy and I are fine. I mean really good.

Raj: It wasn't a pajama party. It was just a couple of bros hanging out, giggling, eating cookie dough and watching Princess Bride.
Howard: Please stop talking.
Raj: As you wish.

Sheldon: Look at her, desperately wishing she was over her at the cool table.
[Cut to Amy laughing with her colleagues at another table]
Sheldon: Don't worry little moth, the flame will come to you.

Amy: And this is Dr. Gundersen from Stockholm.
Sheldon: Ah, Sweden. Home of my favorite Muppet and second-favorite meatball.
*Dr. Gundersen and Amy look blankly at Sheldon*
Sheldon: Okay, the Nordic reputation for a lack of humor is well founded. Boy, is his name Gundersen or No-fun-dersen?

Amy: Where are we going with this Dr. Cooper?
Sheldon: Oh please, I'm your boyfriend. Call me Sheldon.

Sheldon: That's right. I'm in a boy-girl relationship with this cute little lump of wool.

Sheldon: It's a physical relationship, too. With hand-holding, hugging - even on hot days! ... Oww! Here's a new one, apparently we kick each other on the shins under the table.

Sheldon: Maybe your friend Gundersen needs to head over to IKEA and assemble a sense of humor.

Sheldon: Did you know that Los Angeles has a little Sri Lanka?
Leonard: I did not.
Sheldon: Well, I do now. They're a lovely people, although terrifying when you wake up face to face with them.

Sheldon: If you're hungry, I brought home mutton and coconut milk.
Penny: Why'd you do that? You hate lamb.
Sheldon: I was asking for directions. Apparently there was a communication problem.

Leonard: I thought Amy was going to drive you home.
Sheldon: I thought so too, but she's acting very strangely. I was discussing it with a Sri Lankan fella on the bus. He hypothosized that a tiger may have recently run across her shadow. Although he may have just been trying to drum up business for his brother-in-law's witchdoctor practice.

Penny: Okay, what happened between you and Amy?
Sheldon: Can you believe she said I embarrassed her?
Penny: Yeah.

Leonard: Sheldon, I've known you a long time. I'm going to tell you this with all the love I can possibly muster. Amy's right, you're wrong.
Sheldon: But you don't even know -
Leonard: It doesn't matter.
Sheldon: But in my defence -
Leonard: Doesn't matter!