Leonard: Uh-oh.
Raj: What's the matter?
Leonard: Something's wrong, I'm not getting any gas. Anybody know anything about internal combustion engines?
Sheldon: Of course.
Raj: Very basic.
Howard: 19th-century technology.
Leonard: Does anybody know how to fix an internal combustion engine?
Sheldon: No.
Howard: No, not a clue.

Howard: You know, I'm really glad you decided to learn Mandarin.
Sheldon: Why?
Howard: Once you're fluent, you'll have a billion more people to annoy instead of me.

Howard: I invented a game. Want to play?
Leonard: Sure.
Howard: It's called Emily or Cinnamon. I give you actual quotes I've heard Raj say, and you guess if he was talking to his girlfriend or his dog.

Bernadette: Does your mother call you every day at work to see if you had a healthy lunch?
Howard: My mother calls me every day at work to see if I had a healthy bowel movement.

Penny: Give my friend his stuff back.
Tod Zarnecki: I don't know what you're talking about.
Penny: Well then good news. Today's the day a girl's finally going to touch you in your little special place. *Kicks him in the groin*

Raj: Come on, dude, bros before ... my sister.

Todd Zarnecki: Who is it?
Sheldon: Your doom.