3 million years from now the next modern civilizations will be arguing on the internet about how aliens cut these rocks for us.you should cut open a water-jet with a water-jet.Can you cut the crusts off of my sandwich?Now cut the rock batarang into thin slices!WOW! Just cut a rock with a water jet is cool - but the precision of it, is impressive!That's amazing. Didn't think it would actually work. Amazing what some pressure can do.