Have a bunch of old hard drives collecting dust in your closet? Why not turn them into something practical? You could turn one into an orchestra of annoying buzzing sounds or perhaps a clock. Jipa of Metku Mods has turned his deadbeat HDD into a grinder for sanding or sharpening. All it took was a little re-arranging of disks and some sand paper. Oh, and imagination. Imagination is the key to the universe.