The Chant of the Sibyl; True Life.

“Ho there! What's that!” a voice nearer to him cried out in curious alarm, drawing the snap of his attention out of his swirling thoughts. He stopped and looked down the hill, watching the collective of his brethren bewilderedly drop their their skids and turn, raising their hands to mitigate the indistinct glare of the sky.
His senses honed to a sharp enough focus a few moments later to perceive the sound, and the black mass in the sky, at the same time. An ungainly flying shape angled its way through the petticoats of the cloudcover, which was low over the ground but so featureless that it offered little depth-perception to the eye. The staccato of its blades slicing the air to keep it aloft struck Caleb's ears unfettered by the haze that made its shape inconstant in the sky.
Caleb narrowed his eyes for a few moments at the helicopter as it moved inland and then burst into a run back down the slope away from the base. He paused on his way down, skidding to a stop that almost sent him tumbling to grab a bewildered compatriot's shoulder.
(  “You. Find a pair of binoculars,” he gasped, gulping the air, his tired lungs unprepared for the sudden sprint. “Watch that thing as far as you can see it, keep an eye on its direction.”  )

( [True Life] )