Penny: Oh, that's Leonard. He said they're about to cross the border.
Bernadette: I hope the boys don't get too crazy in Mexico.
Penny: Oh, yeah, right. Lock up your daughters or Sheldon might lecture them about the North American Free Trade Agreement.
Amy: Boy, that was a long night for me.

Sheldon: Uh-oh. According to this Mexican Customs Web site, visitors may not bring more than five laser discs, 20 compact discs or 12 VHS tapes.
Raj: We don't have any of those.
Sheldon: How can you be sure? VHS was king when Feynman drove this van. For all we know, there are hidden compartments lousy with Jane Fonda workout videos.
Leonard: If there was a hidden compartment, don't you think you'd be stuffed in it by now?

Sheldon: Are we all up to date on our yellow fever inoculations?
Howard: You don't need a yellow fever shot to go to Mexico.
Sheldon: You can never be too careful. I got one last year before I went to Epcot.

Amy: So, Penny, how's married life?
Penny: Oh, it's good. I just wish Leonard would work up the courage to tell Sheldon he's moving in here.
Bernadette: You guys still aren't living together?
Penny: We are. I mean, he sleeps here. But it's only a matter of time before Sheldon has a bad dream and tries to climb into bed with the Leonard-shaped pile of pillows.

Bernadette: Speaking of Sheldon, how's single life treating you?
Amy: Fine, I guess. I've been focusing on me. I was thinking about changing my wardrobe.
Penny: Yes!
Bernadette: Good for you!
Amy: But then I decided I don't want to go changing who I am just because of some man.
Penny: Yes.
Bernadette: Good for you.
Penny: You know, it is normal to want to change your look after a breakup.
Amy: Actually, I was thinking of making one small change.
Bernadette: Your sweater?
Penny: Your glasses?
Bernadette: Your hair?
Penny: Your shoes.
Amy: Piercing my ears.

Raj: What's wrong with Mexico?
Sheldon: Uh, Mariachi bands, wild dogs, beans that jump around because there's a worm inside.

Howard: Calm down. There's a theme to this weekend. We are going to Mexico in Feynman's van to stay at the vacation house Feynman bought with the money from his Nobel prize.
Sheldon: Viva la Imodium. Ay, ay ay!

Bernadette: Come on, Leonard's doing bachelor stuff. You sure we can't take you to a strip club?
Penny: Nah, if I want to see a naked dancing man, I just flush the toilet while Leonard's in the shower.

Amy: I know we're not making a fuss, but in the spirit of bachelorette parties, I made cookies in the shape of male genitals.
Penny: You really didn't have to- Whoa, that is anatomic.
Amy: Thank you. The veins are gummy worms.
Bernadette: Oh, look, Jewish and gentile.
Amy: I had extra dough.

Sheldon: It's bad enough that I'm being taken against my will. I don't see why it has to be in some hippie's mobile sex dungeon.

Howard: Well, Sheldon, there's something about this van that you're going to find very interesting.
Sheldon: It runs on syphilis?

Leonard: This was Feynman's van? This is so cool.
Raj: Yeah, nothing's been changed since he drove it.
Howard: Bet he picked up a lot of cute grad students in this bad boy.
Sheldon: And talked about physics with them.

Leonard: So, are you going to give us a clue where we're headed?
Raj: Okay. Let's see. They've got spicy food and there's a chance you'll get diarrhoea.
Leonard: India.
Raj: We can drive there.
Leonard: Your house?

Howard: We are going to Me-he-co.
Leonard: Fun! I've never been there.
Sheldon: Leonard, don't be fooled. I'm from Texas. Me-he-co is Spanish for Mexico.

Sheldon: Would you pass the mustard.
Leonard: Sure. Hey, you wanna hear a fun fact about mustard?
Sheldon: Is it that the glucosinolates that give mustard its flavor were evolved by the cabbage family as a defense against caterpillars?
Leonard: Yeah.
Sheldon: Well, that was fun. Good for you, Leonard.