Leonard: No, no, I-I'm serious. If there's things we want to do, let's start doing them.
Penny: Okay. Well, we've never been on a big trip together.
Leonard: I would love that.
Penny: Okay, there's something for your letter: "Considered going on a trip."

Penny: At one point, they had me figure out how to get a banana out of a puzzle box.
Leonard: Wait, Sheldon gave me a banana in a box. He was testing me, too.
Penny: Unbelievable.
Leonard: And how could a chimp even solve that? That was impossible.
Penny: Really? You couldn't get it out?

Leonard: If I take it off, Sheldon wins.
Penny: Sweetie, every night you don't kill him in his sleep, he wins.

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

Sheldon: Can I get you anything else?
Amy: No, thanks. I think I'm good.
Sheldon: You sure? There's still plenty of pork fat. Although, if we don't eat it, I suppose we could turn it into soap.
Amy: That might taste better.

Sheldon: Uh-oh.
Amy: What?
Sheldon: I left the food out.
Amy: You afraid it's gonna go good?

Sheldon: So this is for Amy's birthday. Can I leave it here?
Leonard: Sure. What is it?
Sheldon: A butter churn.
Penny: Aw, that's what I got her.