Quote from Phoebe in The One with the Giant Poking Device
Rachel: Phoebe, you're in pain. Would you just go to the dentist? Just go. Phoebe: Fine. But if you're my next victim, don't come back as a poltergeist who, like, sucks me into the TV set. Rachel: I promise. Phoebe: Although, don't feel like you can't visit.