Chandler: (about Erica) You can't leave me alone with her.
Chandler: This is exactly the kind of social situation that I am not comfortable with!
Monica: What kind of social situation are you comfortable with?
Chandler: It's just that we've never spent any time, you know, alone together.
Monica: You'll be fine... Nah, you won't, but I'll be back in two minutes.