I don't think there's a Star Wars fan alive who doesn't want a lightsaber. And not one of those plastic toys you can get at Target, but a real actual steel-cutting, Sith-beheading lightsaber. I know I want one, with a purple blade, of course. (Because purple's my favorite color.)
But did you ever wonder how a lightsaber works? Sure you did!
(Hilarious pictures there, btw. Via TF.N.)