Reminds me of when I was in the Air Force. I was on a document destruction detail, and one of the devices we had was a shredder powered by a scavenged Caterpillar diesel engine. That sucker would take documents by the arms-full, and keep on chugging. It would demolish staples, paper clips, staplers, hands, and arms. It was neat to see the end result - goo. During the demos, we'd throw in a few reams of pink or blue paper, just so you could actually see the end-result - pink/blue goo.
It was fun to watch. The other fun one was burn barrels and WP grenades.
