Ted: What?
Lily: I know where the locket is. It... It was a few years ago, right before you were supposed to marry Stella. [v.o.] I went down to the bar one night to get a drink, and what should I see?
[flashback:]
Robin: [drunk] Lily! Hey, girl. I got a question for you. Why isn't Ted marrying me?
Lily: Whoa.
Robin: I'm sorry. Oh, God. I'm sorry. I just... I-I should be happy for him, and yet here I am, moving off to Japan just to get away from him. And- And I guess to see those, those terra-cotta warriors and the Great Wall.
Lily: Well, that's China.
Robin: What? This? No, it's just a paper plate. [plate smashes]
Lily: Uh, we should get out of here. Come on. Come on.
Robin: Oh, totally. I know just where we should go.
[flashback to the park:]
Lily: Man, you're fast when you're drunk. But at least you're still making good decisions. Central Park, around midnight, digging a hole with a spoon. Solid.
Robin: Jackpot.
Lily: What is that?
Robin: My something old.
[flashback to the apartment:]
Robin: This locket was my grandma's. She kept it hidden in her butt all through World War II.
Lily: What? Where was she?
Robin: Winnipeg. [laughs] Oh, come on. Lily, it's a joke. Yeah, I was going to wear this when I married Ted. I guess that's not going to happen. So I am taking it with me to Japan. Okay, Lily, help me put this locket in my butt.
Lily: Okay. Uh, you know what? Why don't we put it in this pencil box instead?
Robin: Oh, and then I will take the pencil box with me to Japan. Okay. Hey, Lily? Help me put this pencil box in my butt. Wait! There's one other thing I have to do. Lily, it's very important. It's something that needs to happen right now.
Lily: Yeah?
[present:]
Lily: Then she barfed in my face. It was a lovely night.