Thumbs up to those writers I would say if I met them. Great episode, only watched it about hmmm.... COUNTLESS TIMES. How the writers came up with stuff like that is really really really beond me or anyone. Love the whole "Ross came as doody thing" and the beautiful pink bunny costume.
I really disliked Rachel in this episode though and I didnt feel that she was funny at all in it but they had to have her to glue the whole show together.
My favroutie costume would definetly have to go to Joey but they didn't make it too obious to laugh at before he said that he was Chandler.
All in all great episode.