וַיֵּצֵ֥א הָמָ֛ן בַּיּ֥וֹם הַה֖וּא שָׂמֵ֣חַ וְט֣וֹב לֵ֑ב..
Haman was ecstatic because he was the only person invited, along with King Ahasuerus, to a private wine feast with Queen Esther, and she invited him back for a second feast the next day.
It shows Haman’s inflated ego right before his downfall begins.
וַיֹּ֩אמְרוּ֩ ל֨וֹ חֲכָמָ֜יו וְזֶ֣רֶשׁ אִשְׁתּ֗וֹ אִ֣ם מִזֶּ֣רַע הַיְּהוּדִ֡ים מָרְדֳּכַ֞י אֲשֶׁ֧ר הַחִלּ֣וֹתָ לִנְפֹּ֣ל לְפָנָ֗יו לֹא־תוּכַ֤ל ל֔וֹ כִּֽי־נָפ֥וֹל תִּפּ֖וֹל לְפָנָֽיו׃
After the first banquet, things spiral for Haman. He builds gallows for Mordechai, but overnight the king can’t sleep, discovers Mordechai’s earlier good deed, and orders Haman to honor him.
Haman rushes home broken and tells his wife Zeresh and his wise men/advisers what happened.
Their response is this chilling prophecy: because Mordechai is a Jew, Haman’s fall has already begun, and he has no chance of winning.
Right after this verse, the king’s eunuchs arrive to drag Haman to Esther’s second banquet, where he is exposed and ultimately hanged on the very gallows he built.