Given the crushing strength of this machine and the way large chunks of concrete balance atop distressed rebar, this worker might want to consider goggles and not turning his back on the machine.
Modern cutting pliers for the piles destroying, clogging and pulling of piles. Primitive jackhammers and manual labor against modern powerful automatic pneumatic and hydraulic cutters, cranes and jackhammers. The latest technology, mechanical engineering, intelligent technology, mega machines and heavy equipment. Video from Russia, America, Europe and Asia.
The machine that pushes them in with steady pressure was interesting, too. The tamping kind seem more common, but that seems like a better idea for reducing stress damage to the piling.