Monica and Chandler decide to host a costume party for Halloween. Monica buys Chandler a pink bunny costume and makes him wear it, which he doesn't like at all (she wanted to get him a costume to dress as The Velveteen Rabbit, his favorite childhood book, but instead of it being brown and white, the pink bunny costume was all she could find). However, when Ross comes as "Spud-nik," his clever play on words combining the Russian satellite Sputnik and a potato, he doesn't have the worst costume anymore.