"Things You Wouldn't Know If We Didn't Blog Intermittently."
Indeed. The uniformity of the blocks (all 4 or 6 cyl, straights) and cleanliness leads me to believe that these are defective blocks from a manufacturing environment unsuitable for assembly. Probably BMW or MB.
Now that's just bloody-hell terrifying!
Actually, it looks somewhat artificial to me, and that they are not made out of steel or aluminum, but rather something far more fragile, perhaps plaster or some kind of ceramics. Another thing that I noticed was that the rotors didn't travel at a uniform speed, nor were the blocks fed in at a uniform rate, but in batches. It looked fake to me.
Those who have doubts about the validity of the video can browse industrial shredders in action at this link -http://www.ssiworld.com/watch/watch-en.htm
They're genuine aluminium alloy blocks.As Minnesotastan says, take a look at industrial shredders.The rotors stop and reverse if the load on them gets too great, then they resume, what you're seeing here is a machine clever enough not to break itself by trying too hard. I don't think it could handle iron blocks though.
"Threepio!! Threepio!! Shut it DOWN!!"