What does 1 Kings 20:30 mean?

The rest of the Arameans ran to the city of Aphek, but the city wall collapsed on twenty-seven thousand of them. Ben-Hadad ran into the city and hid in an inner room. 1 Kings 20:30 - Modern Text Bible

(The survivors flee, but disaster strikes again as the city wall falls and kills thousands more. Ben-Hadad hides, desperate to survive.)