For God’s sake, fellas, put some clothes on. No, I take that back - work naked around industrial equipment, by all means! Except for loose-fitting fabric. No chance that’ll get caught in the gears and whip your willie off.

That’s the Horseshoe Curve, of course - an “engineering marvel” completed in 1854 by the Pennsylvania Railroad. The PRR was once the largest publicly traded company in the nation; at its peak, it employed 250,000 workers, and had a bigger budget than the Federal government.