Possibly, it was the rattling of loose stones, possibly her anger dulled her sensibilities to the point where they were incapable of taking note of her surroundings, but the fact remains that as she approached the mouth of a wide coulee that gave into the valley from the eastward, she did not hear the rumble of hundreds of pounding hoofs that each second grew louder and more ominous, until as she reached the mouth of the coulee a rider swept into the valley, his horse straining every muscle to keep ahead of the herd that thundered in his wake.
Apparently the horseman did not notice her, and the next moment Patty was engulfed in the herd. The girl lived one wild moment of terror. In front, behind, upon each side were madly plunging horses, eyes staring, mouths agape exposing long white teeth that flashed wickedly in the moonlight, manes tossing wildly, and air whistling through wide-flaring nostrils. On and on they swept down the valley. The roar of hoofs rose to a mighty crescendo of thunder, above which, now and then, the terrified girl caught fierce yells from the flank of the herd. So close were the terrorized horses running that it was impossible for the girl to see the ground before her. Sweating, plunging bodies surged against her legs threatening each moment to scrape her feet from the stirrups. Gripping the horn with both hands she rode in a sort of daze.
Glancing over her shoulder, she caught an occasional flash of white as the men on the flanks waved sheets above their heads, whose flapping, fluttering folds urged the maddened horses into a perfect frenzy of action.
In front, and a little to one side of Patty, a horse went down, a big roan colt, and she got one horrible glimpse of a grotesquely twisted neck, and a tangle of thrashing hoofs as another horse plunged onto his fallen comrade. A horrible scream split the air as he, too, went down, and the sudden side-surge of the herd all but unseated the clinging girl. In a second it was over and the herd thundered on. Patty closed her eyes, and with white, tight-pressed lips, wondered when her horse would go down. She pictured the bloody, battered _thing_ that had been herself, lying flattened and gruesome, in the moonlight when the pounding hoofs swept past.