The sonoran desert route was his favorite. his friends were surprised he could endure the solitude of it, but he cherished the barren miles. today he’d passed a mile of verbena in full bloom, followed by ten miles with nothing but sagebrush. the next leg promised cliffs, and he loved to imagine scaling them as he traversed the desolate highway. in fact, one was rising in the distance, and the highway would bear right around it. he looked down to cool the temperature, looked up again, and stared. the grill of a tractor trailer, in his lane, was bearing down upon him. how does the excerpt exemplify the ideas king describes in "danse macabre"?