At my yard the guy running the crane does other stuff when not loading trailers. The other guy with the bulldozer watches what gets tossed in the shred pile. He keeps a eye out for lets say,,,, Logs, bricks, stormdoors with glass, ect. But when its time to push the pile in, hes in the dozer. They pull out the good stuff like towers, Transmissions, Car rims, aluminum chairs/ tables ect thats acessable and put it off to the side. It could be that its in the ghetto and the tweeks just throw it in the pile and go get there fix money. I hate those 55 gallon garbage can walk-in people that cut everyone in line to get on the shred scale.