Mjs11211

i meant transformer, not transistor,(oops) but i realized that wouldn't work either

yes, it is possible, I believe that is called a rail gun and are not that hard to make. I have built a variation on the rail gun that fires aluminum disks, by using a coil on the bottom of the barrel. Check out http://www.amazing1.com it has a kit to make one. they call it a mass launcher for the original shake flashlight, like alchemist said couldn't you use a transistor to amplify what current you get from shaking?