My name is Purim, and I come great fun and frolic bringing by jonah

Question 6

In the Talmud, tractate ~Megillah~, Rava says that on Purim ONE MUST DO WHAT so that he is unable to distinguish between "blessed be Mordechai" and "cursed be Haman"?

get drunk (or "mellow oneself", as the tractate literally says)