S8E4: The One with the Videotape

Monica and Chandler return from their honeymoon with stories of a couple that they met on the flight back, but soon discover that the couple gave them a wrong number. Meanwhile, Ross and Rachel tell everyone about the night they were together, however, their stories differ as to who made the first move. While Ross emphatically defends his side of the story, he accidentally reveals that he has the encounter on videotape. Unsurprisingly, everyone wants to see it.