You have got to see this Car Grinder. This mechanical monster is evidently replacing the car crusher. Remember those big loads of flattened cars on 18 wheelers going down the highway? May be a thing of the past.
This sucker even grinds up engine blocks. I don't know what powers it, but there has to be a lot of ratio gearing to keep it moving. It reverses now and then to clear the hard core debris that gets stuck.