Leonard: I know what you're doing. You're trying to get attention so we'll feel bad for you, but it's not happening.
Sheldon: No, what I'm doing is trying to figure out how to live my life now that everyone is leaving me.
Leonard: Will you knock it off? We're across the hall.
Sheldon: As the kids are saying today, "talk to the hand."
Penny: They're not saying that.
Sheldon: They are in 2003.
Penny: No, no. They're really not.

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?

Howard: You know what's really happening here? Your girlfriend is breaking up our band.
Raj: She has nothing to do with this. I am my own man.
Howard: Oh, please. Your brain belongs to whoever's willing to sleep with you.
Raj: That is so not true.
Howard: Really? Remember when you were gonna get circumcised for Rachel Bernstein?
Raj: That had nothing to do with Rachel. It was an overreaction to a bad zipper injury.

Howard: What kind of music are you thinking of?
Stuart: I like all kinds of music, but my favorite genre is free.

Howard: I don't need this. I'm quitting the band!
Raj: Fine, I quit, too!
Howard: Then get out of my house!
Raj: With pleasure!
*door slams*
*Howard sighs*
Howard: Raj, wait!
Raj: What took you so long?