What does Joshua 8:20 mean?

And when the men of Ai looked behind them, they saw, and, behold, the smoke of the city ascended up to heaven, and they had no power to flee this way or that way: and the people that fled to the wilderness turned back upon the pursuers.

And when the men of Ai looked behind them, they saw, and, behold, the smoke of the city ascended up to heaven, and they had no power to flee this way or that way: and the people that fled to the wilderness turned back upon the pursuers.

And when the men of Ai looked behind them, they saw, and, behold, the smoke of the city ascended up to heaven, and they had no power to flee this way or that way: and the people that fled to the wilderness turned back upon the pursuers.

Then the men of Ai, looking back, saw the smoke of the town going up to heaven, and were unable to go this way or that: and the people who had gone in flight to the waste land were turned back on those who were coming after them.

And the men of Ai look behind them, and see, and lo, the smoke of the city hath gone up unto the heavens, and there hath not been in them power to flee hither and thither--and the people who are fleeing to the wilderness have turned against the pursuer, --

And the men of the city, that pursued after Joshua, looking back, and seeing the smoke of the city rise up to heaven, had no more power to flee this way or that way: especially as they that had counterfeited flight, and were going toward the wilderness, turned back most valiantly against them that pursued.

And the men of Ai turned and saw, and behold, the smoke of the city went up to heaven, and they had no power to flee this way or that way; and the people that fled to the wilderness turned upon the pursuers.