The answer is: Hang him on a gallows

Esther 5:14; 7:9-10 - Haman’s downfall demonstrates poetic justice. The gallows he prepared for Mordecai became his own execution site, highlighting God’s providence in protecting His people.

Haman’s story in the Book of Esther is a classic example of poetic justice, which can be a hilariously ironic twist in life where an evil plot turns back on its plotter. Haman, fueled by pride and a deep-seated grudge against Mordecai—who wouldn't bow to him—unleashed a vile plan to annihilate the Jews. But, amusingly enough, it’s the very gallows he erected for Mordecai that ended up being his own downfall!

Fun facts about gallows: in ancient Persia, these structures were often not the wooden kind like we might visualize today. Some historians suggest that they could have been large stakes used for impalement, said to be particularly brutal. Ouch! Esther’s tale is also riddled with themes of hidden identities and ironic reversals. Mordecai, who had initially stayed low-key to protect his people, eventually becomes the celebrated hero. Simultaneously, Haman morphs from the king's favored official to the infamous villain in the ultimate loser bracket—home invader meets fit of cosmic karma!

God’s unseen hand, pulling strings behind the scenes is a major theme here. And, interestingly, this story shines a spotlight on advocacy and courage, as Esther steps out of her palace banquets to save her entire community. It illustrates that sometimes the hopeful underdog, in brave defiance, can triumph against tyrants. Isn’t that a promise worth remembering?