<P> Ross and Rachel wake up in bed together, immensely hung - over and unaware that they got married the night before . Joey joins Phoebe for breakfast, telling her his movie has been canceled . Monica and Chandler arrive and, at the buffet, Chandler tells Joey he and Monica were also planning to wed and expresses worry that the relationship is moving too fast . Monica shares the same concern with Phoebe but they are interrupted when Ross and Rachel arrive . When the others tell them they are married, they decide to get an annulment, leading to a large number of jokes about Ross' failed marriages, much to his anger . </P> <P> Joey encourages Phoebe to go with him on the long drive back to New York, to stop him from being lonely . She agrees but she is annoyed when Joey spends the whole first day asleep while she drives, and they switch over . As Phoebe sleeps, Joey picks up a hitchhiker . Initially outraged, Phoebe soon strikes up a friendship with the man, and gives him her number when he leaves . Joey asks for her forgiveness and they play car games . </P> <P> Monica and Chandler are still undecided about where their relationship is going, and look for signs that they should get married . They grow increasingly alarmed when all the signs are positive, and eventually Chandler suggests he just move into Monica's apartment with her, which she agrees to . Ross tells Rachel that he does not want three failed marriages and attempts to convince her to change her mind about the annulment, but she refuses and pressures him to get the annulment . He concedes and later tells her he took care of it, but reveals to Phoebe that he lied: They are still married . </P> <P> The new sets constructed for the previous episode were left standing over the summer hiatus, allowing the production team to resume filming on the Vegas sets with minimal disruption . A discussion was held during rehearsals about the ink Ross and Rachel had applied to each other's faces in the previous episode; dialogue had established that it was permanent and Marta Kauffman was keen to show it was still there in the scene where Ross and Rachel arrive at breakfast, albeit fainter than before . Others preferred that it was gone completely and this was what was shown in the scene as filmed . There was worry that people would not understand the joke that indicated Phoebe had married someone in a Vegas wedding, but a vox pop of the audience showed they did . </P>

When did they decide to put chandler and monica together