Zack: How about you? Hey, how's Leonard? Is he still smart?
Penny: Yes, yes, he's working for the government on an infinite persistence gyroscope. Of course, the first time I say it right, he's not even here.

Zack: Do you have a bodyguard to keep spies away?
Leonard: I have Sheldon, that keeps most people away.
Zack: I miss that guy. He's like the Swedish Chef Muppet. I don't know what he's saying, but he's funny.
Leonard: Oh, I know what he's saying, and he's not, he's not funny.

Bernadette: So you wanted to learn something physical and you came to Howard Wolowitz?
Howard: Hey, the circus arts are very physically and mentally demanding. Have you ever tried to juggle?
Bernadette: Yes, I'm juggling my love for you and my embarrassment of you right now.
Howard: And it's hard, isn't it?

Sheldon: Physicist, baker, lover, what can't I do?

Amy: Where did you get it?
Sheldon: Howard said I could borrow it, Bernadette said forever.

Bernadette: So you wanted to learn something physical and you came to Howard Wolowitz?

Howard: All right, this is everything. What do you want to learn?
Sheldon: It really doesn't matter, as long as it's challenging.
Howard: Okay, well, how about, oh, I teach you some close-up magic.
Sheldon: Howard, I'm trying to make myself uncomfortable, not everyone else.

Sheldon: Shall we?
Raj: Oh, my God. It's light, it's flaky, it's buttery. You don't need to have sex with him, just eat one of these.

Penny: Uh, what's new?
Zack: Oh, tons of stuff. Put artificial grass in my backyard, got engaged, had a scary mole that turned out to be Sharpie.
Penny: Well, congratulations.
Zack: That's what my dermatologist said.
Penny: No, on getting engaged, good for you.
Zack: Oh, thanks.

Penny: Come on, I spent an entire plane ride with you talking about the trailer for Deadpool 2.
Leonard: Ha! I knew you weren't asleep.

Raj: You want a real challenge, try keeping me from eating more of these.
Sheldon: You're just using food to mask the fear that you're fundamentally unlovable and therefore going to be alone forever.
Raj: Damn it, he's good at that, too.

Amy: What smells so good?
Sheldon: Raj is teaching me to make croissants.
Amy: Is this part of your super-aging?
Sheldon: Yes. Yeah, it seemed daunting at first, but then I realized, it's like the chemistry set I had as a kid.
Only, when your brother eats this, no one has to call Poison Control.

Penny: Hey, where's your fiance?
Zack: Oh, she couldn't make it. She had an emergency.
Penny: Oh, no, what happened?
Zack: I didn't ask.

Amy: Okay, fine, let's say you never win a Nobel Prize. Let's say you spend your life doing solid scientific research surrounded by friends and loved ones who appreciate you, not for what you've accomplished but for who you are as a man. Wouldn't that be a life well-lived?
Sheldon: You're so cute. I'm going to go learn how to walk on stilts.
Amy: So many warnings.

Amy: What happened to learning the unicycle?
Sheldon: Oh, I stopped that, it was dumb. Uni, bi, tri, menstrual, all cycles are dumb.
Amy: You said juggling was dumb, too.
Sheldon: Well, it is. If I wanted to hold three things at once, I'd wear cargo pants.