The sudden collapse of a mighty, arrogant empire leaves a haunting contrast between its glorious past and its desolate present. The commentators agree that the city in question is Nineveh, the massive capital of Assyria. At the height of its greatness, Nineveh was a city of constant, deep joy, proud of its successes and enjoying a long-lasting sense of security [מצודת דוד, אברבנאל, מצודת ציון]. Fueled by this immense power, the city believed in its absolute superiority. The primary approach among commentators is that Nineveh viewed itself as completely unmatched, convinced that no other city could ever rival its strength and happiness [רש״י, רד״ק, מצודת דוד, אברבנאל, ביאור שטיינזלץ]. This poetic expression of supreme arrogance is also found in the Book of Isaiah [מלבי״ם].
Then comes a dramatic reversal. The once bustling and enormous center of government was entirely struck down. It was left completely empty of its inhabitants, turning into a wasteland where wild animals now rest among the ruins [אברבנאל, ביאור שטיינזלץ].
One perspective offers a unique way to view the flow of these events, suggesting that the shock of the destruction actually frames the entire scene. Anyone walking past the ruins looks upon them and asks in wonder how such a famously joyful city could become an utter wasteland [מלבי״ם]. The physical reaction of these passersby is visceral. They purse their lips to make a hissing sound and shake their hands [מצודת ציון]. These gestures express a profound shock, amazement, and mourning over witnessing such an important and colossal empire destroyed down to its very foundations [מצודת דוד, אברבנאל, ביאור שטיינזלץ].