Sheldon: Is there any reason you're keeping this dead goldfish?
Penny: Damn, I forgot to feed him and that I had him.
Sheldon: Well, now, did you also have a dog? Because I found what appears to be a battery-operated chew toy.
Penny: Party's over. Party's over.
Leonard: Mmm, you know, we could throw a dinner party too. Maybe even ask everyone to get dressed up.
Penny: Sure. Just when you say "dressed up" you mean nice clothes, right? Not, like, capes and tights and crap
Bernadette: Everyone of you has the capacity to be anything you want to be.
Penny: Unless you want to be Cinderella.
Bernadette: Come at me. See what happens.
Penny: Leonard Hofstadler...
Penny: Will you be my valentine?
Leonard: Sorry. Maybe, next year. ... I'm just kidding. Romance ninja. Let's have sex! Wah!
Leonard: You know what? That was pretty crappy of you. All I wanted to do was to give you a great night and it was like you went out of your way to destroy it.
Penny: Yeah, I know. I'm a total bitch.
Leonard: I'm not saying that.
Penny: Well, I am.
Leonard: Oh, fine you win. You're a bitch.
Leonard: Two can play this game.
Penny: Get up.
Penny: No, I said "Oh my God, I think that old guy's choking" and one of the busboy's Heimlich'd him.
Leonard: You're a hero...
Penny: Yeah ... that was the point of the story.
Sheldon: I suppose there's no choice but to face the crying, angry accusations, and the high pitch wails of despair.
Penny: Yeah and who knows how Amy will react.
But, you two make such a cute couple. Like Bert and Ernie. You guys even teach me stuff about words and numbers.
Penny: Okay. Hang on. Are you saying some day that you and Amy might actually get physical?
Sheldon: It's a possibility.
You ever going to sleep with Amy?
Bernadette: Well, what if Hulk picked up Thor while Thor is holding the hammer.
Bernadette: Then by the transitive property of picking things up Hulk picked up the hammer.
Amy: No. Hulk picked up Thor. Thor picked up the hammer.
Penny: Okay, hang on. If I go to a bar and pick up a guy and he picks up a girl and then we all leave together. Did I pick up the girl?
Amy: Did that ever happen?
Penny: Hey, are we talking about me or are we talking about Thor?