The cold, damp air seared his throat, and his right side felt like somebody had slipped a stiletto into his ribs and was now playfully twisting it. His legs were lead-heavy and he could hardly feel his feet pounding against the pavement as he ran. No useful sensations—like whether he was on dry ground or sloshing through an oily slick that would land him on his face—but the burning in his thighs and calves wouldn’t go away. "I thought numbness meant no pain," he grumbled to himself through clenched teeth.