Bernadette: Well, what if the Hulk picked up Thor while Thor is holding the hammer?
Amy: Yeah?
Bernadette: Then by the transitive property of picking things up, Hulk picked up the hammer.
Amy: No. Hulk picked up Thor, Thor picked up the hammer.
Penny: Okay, hang on. If I go to a bar and pick up a guy, and he picks up a girl, and then we all leave together, did I pick up the girl?
Amy: Did that ever happen?
Penny: Hey, are we talking about me or are we talking about Thor?

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?

Raj: Are they actually arguing about comic books?
Leonard: No, that can't be right.
Howard: Maybe "Thor's Hammer" is a new color of nail polish.

Bernadette: Why are they staring?
Amy: Who cares? Just soak it in. Hello, boys.
Stuart: Oh, hey. (To the other customers) Could you please stop staring? They're just girls. It's nothing you haven't seen in movies or in drawings.
Penny: Hey, Stuart.
Stuart: What brings you guys here?
Bernadette: We were looking for a recommendation about comic books.
Stuart: Oh, well, I recommend you don't open a store and sell them.
Penny: No, we were just wondering why the guys like this stuff so much, so we thought wed give it a try.
Stuart: Oh, okay. What do you think you might be into? Superhero, fantasy, graphic novels, manga? (To the customers) I swear I will turn a hose on you.

Raj: Insurance will replace your car, it won't defunk my junk.