It was definitely Amy from the show. He went home to his wife, told her it was over that night (after the filming crew couldn't get any usable homecoming footage) and then filmed the piece at his school. Oh - P.S. - then he walked out on his teaching job. He has told people he will be an actor OR in the NFL. I kept wondering how his poor wife felt watching the marathon - I hope she didn't!
It's a shame that his success went to his head like that. The other cast members have predicted that Amy will wise up & Marty is about to come face to face with the cold hard realities of life. I predict Surreal Life 9 or 10 for Marty