My favorite Friends quote would have to be from an episode early in season 1, where they're sitting around Central Perk talking about what they would do if they were omnipotent (I'm paraphrasing because I don't have my DVDs with me)...
Joey: I'd kill myself
Ross:
Omnipotent
Joey: Oh my God, I'm so sorry! I thought it was just a hypothetical question!
Heh, Lexi. *drools over the pretty picture*
"There was this one time an alarm went off - it was in the middle of '24.' That's just wrong. Everyone knows everyone was watching '24' at that time."
--NYU student quoted in the Washington Square News about students ignoring the frequent fire alarms in dorms