Sheldon: I know why. You've come to me because you're my Obi-Wan.
Arthur: I'm not familiar with that. Is that an Internet?

Professor Proton: Oh, great, this again.

Professor Proton: Why isn't it ever Angie Dickinson's bedroom?

Arthur: Where are we?
Sheldon: This is the swampland of Dagobah. It's where Luke was trained in the ways of the Jedi.
Arthur: Oh, too bad. I thought it was Florida.

Amy: I guess it must have been back when I was in the Girl Sprouts.
Bernadette: Girl Sprouts?
Amy: My mom made it up as an alternative to the Girl Scouts. She didn't want me selling cookies on some street corner like a whore.

Penny: Oh, I get it. Like C-3PO. ... What happened to me?

Bernadette: I got into science because I was always the smallest kid in the school. I thought if I became a scientist I could invent a formula that made me taller.
Amy: That's cute.
Bernadette: I thought it was working for a while, but then I found out my brother was just lowering the pencil marks on the door frame.