Sheldon: You know, I got her an iPhone for Christmas. I'll see where she is.
Leonard: Oh, that's nice. Most people her age don't embrace technology.
Sheldon: Oh, no, she doesn't even know she has it. No, I had my sister slip it in her bag so that I can track her like a sea turtle.
Leonard: Same as when we lost you at the zoo.
Sheldon: Uh, for the hundredth time, I smelled kettle corn and couldn't find the cart.
Leonard: Still doesn't explain how you ended up on the freeway divider.

Leonard: What would you be if you were attached to another object by an inclined plane, wrapped helically around an axis?
Sheldon: Screwed?
Leonard: There you go.

Leonard: Penny, as a scientist, my job is to figure out why things happen. But I don't think I'll ever understand how someone like me could get to be with someone like you. You know maybe I don't need to understand it, I just need to be grateful. I love you, Penny.

Sheldon: This song is never going to stop. Have you ever dealt with something so relentlessly irritating?
Leonard: That's a trick question, right?

Amy: You have an engagement ring?
Sheldon: Yes.
Amy: Penny, did you know about this?
Penny: All right, let's go.

Meemaw: Thank you, Moon Pie.
Amy: Uh, I'm curious. Why do you call Sheldon "Moon Pie?"
Meemaw: 'Cause he's so nummy-nummy.
Leonard and Penny: She could just eat him up.

Amy: That's great. And look at you, sitting in Sheldon's spot. You know, I don't even get to sit there.
Sheldon: Yeah. And you never will.