Penny: Uh-oh. I haven't been to a lot of parties like this, but what does a physics rumble look like?
Leonard: Kind of like angry chickens. Hmm. Or-or-or-or like, uh, when-when puppets fight.

Leonard: What would you be if you were attached to another object by an inclined plane, wrapped helically around an axis?
Sheldon: Screwed?
Leonard: There you go.

Sheldon: This song is never going to stop. Have you ever dealt with something so relentlessly irritating?
Leonard: That's a trick question, right?

Leonard: Penny, as a scientist, my job is to figure out why things happen. But I don't think I'll ever understand how someone like me could get to be with someone like you. You know maybe I don't need to understand it, I just need to be grateful. I love you, Penny.

President Siebert: Look, it doesn't matter if they have popular support, we're gonna get the scientific community behind us.
Leonard: He's right, the Nobel Prize is about the work, and as your fellow scientists, we support you and Amy.
President Siebert: That's great, Scooby Gang.

President Siebert: Dr. Cooper, there you are. I just wanted to tell you not to worry about this Pemberton and Campbell publicity blitz.
Sheldon: Are you worried?
President Siebert: Not at all. Not even a little bit. [manic laugh]

Sheldon: Look at this. They posted another video. It's not even about science. They're on a celebrity bus tour.
Raj: Those are fun. I went on one and saw Tom Hanks talking to his gardener. He's even nice when you plant the wrong color azaleas.