Bernadette: Howie? You doing okay? You've been in there a while.
Howard: (In the bathroom) I'm fine. Be right out.
Am I an American hero? Well, that's a good question, Jim. Dont you think once an astronaut leaves the planet, he's a hero to all the nations of the Earth? (Toilet flush) Okey dokey. I think I have time for one more question.

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.

Bernadette: Maybe we should get one of those machines to help her up the stairs.
Howard: You mean a forklift?

Sheldon: Sheldon Cooper does not cry.
Howard: That's true, you'd rust.

Penny: Helium.
Sheldon: Yes.
Penny: Yes.
Sheldon: Taylor Swift.
Penny: Yes. Pi.
Sheldon: Yes. Kardashian.
Penny: More specific.
Sheldon: Khloe?
Penny: Yes.
Sheldon: See, I remembered because if it looks like Kim it's Kim, if it looks kind of like Kim it's Kourtney, and if it looks nothing like Kim it's Khloe.

Stuart: Anyone else need anything before I go?
Howard: I'll give you a dollar if you make fun of Raj.
Stuart: That's mean.
Howard: Five.
Stuart: You look like Tigger if Tigger looked like a jackass.
Howard: Uh, if you ever need a reference or anything, just let me know.

Raj: Boy, all this standing's making me tired. Good thing I brought my collapsible stick chair.
Howard: Not the stick chair. You look like an idiot on that thing.
Raj: Sticks and stones may break my bones, but chairs on sticks are comfy.