It was an ordinary Tuesday afternoon at the Kilometer 14 highway expansion project. Dave, a heavy machine operator with fifteen years of experience, throttled the engine of his 40-ton excavator. His task was simple: clear out a stubborn outcropping of earth and rock from a steep, ancient shale cliffside before an evening storm rolled in.
He swung the massive steel bucket toward a dark, mossy boulder protruding from the cliff face. It looked completely unremarkable—roughly the size of a kitchen table. Dave hooked the bucket’s teeth beneath the rock and pulled back on the hydraulic levers, expecting the boulder to pop loose from the mud. Instead, the mountain fought back.
The excavator’s engine roared in protest as the hydraulic pressure spiked. In a split second, the laws of physics bent. Instead of the rock moving, the rear end of the massive machine violently left the ground. The heavy steel tracks launched four feet into the air—a terrifying, nose-heavy pitch that nearly flipped the excavator down the ravine. Dave slammed the controls forward, dropping the machine back down with a deafening crash.