[Gunther angrily watches Rachel kiss Ross]
Ross: Hi, Gunther.
Gunther: Yeah. We'll see.

Joey: Gunther? Hey, don't let that guy in here anymore. He just said Phoebe's a porn star.
Gunther: Well, I wouldn't call her a star, but she's really good. You should check out lnspect Her Gadget.

Gunther: And later, when you have a moment, I want to show you why we don't just trap spiders under coffee mugs and leave them there.

Gunther: Remind me to review with you which pot is decaf and which is regular.
Rachel: Can't I just look at the handles on them?
Gunther: You would think.

Gunther: Rachel is my girlfriend.