Penny: So, what are you working on right now?
Leonard: It's actually pretty neat.
Penny: Yeah?
Leonard: Yeah. It's a front-projected holographic display combined with laser-based finger tracking. Here, I'll show you. We'll just put this pencil over here.
Penny: Sharp. Thanks to the machine we saw earlier.

Leonard: And then a laser will map the reflective surface, and voila. (A floating 3-D image of the pencil appears. Leonard moves it around with his finger)
Penny: Wow. That is amazing.
Leonard: You know, there's a foundational idea in string theory that the whole universe may be a hologram.
Penny: What do you mean? (Leonard flicks a switch. The hologram changes to a view of the planet Earth). Oh, wow!
Leonard: Uh-huh. Well, the holographic principle suggests that what we all experience every day in three dimensions may really (changes projection to the solar system) just be information (changes the projection to the galaxy) on a surface located at the farthest reaches of our cosmos. (Sets the galaxy spinning) So it's possible that our lives are really just acting out a painting on the largest canvas in the universe.
Penny: Hmm.
Leonard: What?
Penny: Sometimes I forget how smart you are.
Leonard: You should visit more often.

Penny: Whoa! That is very cool.
Leonard: Sometimes I like to turn this on and pretend I'm the super villain Magneto.
Penny: Getting a little less cool, Leonard.
Leonard: But what I really am is a very smart scientist who understands the mechanics of the universe and is wearing the sexy black underwear you bought him.
Penny: There we go.

Penny: Okay, glasses off. Find Waldo.

Penny: Hey, Sheldon, you're always full of fun little facts. Where did the expression get your ass handed to you come from?
Sheldon: Don't know.
Penny: I wonder if it's from like ancient Rome where they'd actually chop somebody's ass off and then go, here. You know, to appease Loseroneous, the God of losers.

Sheldon: Well, regardless, she has a distinct advantage in all tavern-based competitions. Pool, beer pong, wet T-shirt contests, they're all out.
Penny: Okay. Just for the record, I have never entered a wet T-shirt contest. I've won a few, but that's just because I spill when I'm drunk, so...

Leonard: If you want help, just hire a grad student.
Penny: Maybe I could do it.
Sheldon: You, really? You can assess the quality of my work? Okay, um, here. I wrote this when I was five years old.
Penny: A proof that algebraic topology can never have a non self-contradictory set of abelion groups. Im just a blond monkey to you, aren't I?
Sheldon: You said it, not me.

Sheldon: Are you familiar with the Higgs boson?
Penny: Of course, it is - it's been in the news. And it's a very famous boson.
Sheldon: Nice try.

Amy: Sheldon told me he had a new assistant named Alex. He didn't mention that Alex was a girl.
Penny: Maybe he didn't notice.

Penny: She is not going to come on to Sheldon.
Amy: Oh, really? Look at this face. How can any woman spend eight hours a day alone with this face and not fall in love with it?
Penny: Well, for starters, at some point that face starts talking.

Penny: Well, of course he's desirable. I mean, he's great. He's smart, he's sweet and, ooh, in the bedroom, whew, let me tell you he really tries.

Penny: Hey, Sheldon? Hi. This came for you today. It's from your mom.
Sheldon: Oh, thank you, Penny.
Penny: M-hmm.
Sheldon: Yeah, wait, here. (Hands Penny a dollar bill) For your troubles.
Penny: Oh, boy, a whole dollar. Now, I can quit my paper route.

Amy: Oh, yeah. I'm a man-eater now.
Penny: Okay, for the final touch, this is an eyelash curler. You just place it on your lashes and squeeze it closed.
Amy: Oh, I don't know. Looks like something used by Tinkerbells gynecologist.
Penny: Who I hope for her sake is not Captain Hook.

Alex: Sheldon thinks the approach in this paper might change the way we calculate ferromagnetic hysteresis.
Penny: Oh, it's about time. I hated the old way.

Leonard: Where are we going?
Penny: My limbic system wants to take your pants off.