If you happen to have say, 300 microwaves kicking around between you and your friends, it turns out that you'd have a large part of the ingredients necessary for a pretty substantial weapon. That is, according to two New Mexican inventors, who recently filed a patent for a "high-power microwave system employing a phase-locked array of inexpensive commercial magnetrons." Translated into English that basically means that these guys claim you can combine the magnetrons (the bits that generate the actual microwave that cooks your popcorn) from a bunch of consumer-grade microwaves and tweak 'em a bit to develop a megawatt-level death ray, or in military/legal parlance, a "directed energy weapon system." Yeah, we've seen energy weapons (or tools, if you prefer) before, but this is probably one of the first times that we've seen ordinary kitchen technology more complicated than a knife turn into a seriously lethal weapon.
[Via New Scientist]