Well, Hurley had one line, so therefore I don't have a favorite line this episode.
There weren't many funny moments to choose from. I did like the exchange between Sun and Claire:
Sun: A mother should never leave her child.
Claire: Oh, wait...are you a mother?
Sun: Uh, no.
Claire walks off.
I thought Sun was going to say yes...but the previews did show Sun asking Sawyer for a pregnancy test (who brought THAT on the plane?) So maybe she was thinking she was pregnant when Claire asked her that.