Phoebe: Now, we can kick anybody's ass!
Ross: After one class? I don't think so.
Rachel: What? You want to see me self-defend myself? Go over there and pretend you're a sexual predator! Go on! I dare ya!
Ross: Well, of course you can defend yourself from an attack you know is coming, that's not enough. Look, I studied karate for a long time, and there's a concept you should really be familiar with. It's what the Japanese call unagi.
Rachel: Isn't that a kind of sushi?
Ross: No, it's a concept.
Phoebe: Yeah, it is! It is! It's freshwater eel.
Ross: All right, maybe it means that too.
Rachel: Ooh! I would kill for a salmon skin roll right now.
Ross: Y'know what? Fine! Get attacked! I don't even care!
[ater Ross has bragged about having "unagi"]
Rachel: Ah, salmon skin roll.
Phoebe: [after Chandler mentions he and Monica will make anniversary gifts for each other] So what did you make Chandler?
Chandler Bing: Oh, I made a 'flablarghaargh'...
Phoebe: What is that?
Chandler Bing: Nothing!
Ross: About that last move where the woman tripped you and then pinned you to the floor, what would you do next?
The Instructor: Well, she would try to take her keys and then jam...
Ross: No. No, what would *you* do next?
The Instructor: Who, me? The Attacker?
Ross: Yes, That's right.
The Instructor: Why?
Ross: I tried attacking two women - did not work.
The Instructor: What?
Ross: It's OK. I mean, they're my friends. In fact I was married to one of them.
The Instructor: Let me get this straight. You attacked youe ex-wife?
Ross: Oh, no, no, no. I *TRIED*.
Joey Tribbiani: I used to get medical experiments done on me all the time!
Chandler Bing: Ah, finally: an explanation.
[Rachel and Phoebe have Ross pinned to the ground after he tried to scare them back]
Rachel: Say it. Say we are unagi.
Ross: It's not something you are, it's something you have!
Ross: Chandler. I sensed it was you.
Chandler Bing: What?
Ross: 'Unagi.' I'm always aware.
Chandler Bing: Are you aware that unagi is an eel?