He groped with his foot, contacted a sloping beam, and brought his other foot in. I felt a dull, scraping slither under his moccasin soles. "Frost," he thought calmly, rubbed a clear patch with the edge of his foot, put his weight on it, and transferred his hands to the beam with a twist we hadn't learned in Corps school. My heart did a double-take; one slip and he'd be off into the gorge, and the frost stung, melting under his bare fingers. He lay in the trough of the massive H-beam, slid down about twenty feet to where it made an angle with an upright, and wedged himself there. It took all of twenty seconds, really. But I let out a breath as if I'd been holding it for minutes. As he settled, searchlights began skimming the bridge. If he'd been running, he'd have been shot to a sieve. As it was, they'd never see him in the mingled glare and black. His heart hadn't even speeded up beyond what was required by exertion. The train roared around a shoulder and onto the viaduct, shaking it like an angry hand. But as the boxcars thunder-clattered above his head, he was peering into the gulf at a string of feeble lights threading the bottom. "There's the flywalk, Willie. They know their stuff. But we'll get it." Then, as the caboose careened over and the searchlights cut off, "Well, that gives us ten minutes before the patrol comes back." * * * * * He levered onto his side, a joint at a time, and began to climb the beam. Never again for me, even by proxy! You just _couldn't_ climb that thing nohow! The slope was too steep. The beam was too massive to shinny, yet too narrow to lie inside and elbow up. The metal was too smooth, and scummed with frost. His fingers were beginning to numb. And--he _was_ climbing! In each fin of the beam, every foot or so, was a round hole. He'd get one finger into a hole and pull, inching his body against the beam. He timed himself to some striding music I didn't know, not fast but no waste motion, even the pauses rhythmic. I tell you. I was sweating under my leathers. Maybe I should have switched the ICEG off, for my own sake if not to avoid distracting Clyde. But I was hypnotized, climbing. In the old days, when you were risking your neck, you were supposed to think great solemn thoughts. Recently, you're supposed to think about something silly like a singing commercial. Clyde's mind was neither posturing in front of his mental mirror nor running in some feverish little circle. He faced terror as big as the darkness from gorge bottom to stars, and he was just simply as big as it was--sheer life exulting in defying the dark, the frost and wind and the zombie grip of Invader. I envied him. Then his rhythm checked. Five feet from the top, he reached confidently for a finger hole ... No hole.