From the text:

It seemed when the first stroke of nine banged from the big courthouse clock all the lights were on and business humming in the shops. But by the time the last stroke of nine shook everyone's fillings in his teeth, the barbers had yanked off the sheets, powdered the customers, trotted them forth; the druggist's fount had stopped fizzing like a nest of snakes, the insect neons everywhere had ceased buzzing, and the vast glittering acreage of the dime store with its ten billion metal, glass and paper oddments waiting to be fished over, suddenly blacked out. Shades slithered, doors boomed, keys rattled their bones in locks, people fled with hordes of torn newspaper mice nibbling their heels.