What does Esther 6:9 mean?

The king said to Haman, 'Great idea! Go at once and do everything you've said for Mordecai the Jew, who sits at the king's gate. Don't leave out a single detail.' Esther 6:9 - Modern Text Bible

(The king tells Haman to honor Mordecai in exactly the way Haman described, turning Haman's expectations upside down.)