Yeah, I agree on the water jet issue - it's definetly some wicked pressure going on! ("as high 60,000 pounds per square inch") I've seen a few shows where they're using the water jet to cut metal! ("Water jets are capable of cutting many industrial materials including stainless steel, Inconel, titanium, aluminium, tool steel, ceramics, granite, and armor plate")
take a look:
http://www.emachineshop.com/machines...et-cutting.htm
http://www.teskolaser.com/waterjet_cutting.html