I was thinking about how energy can sometimes turn into matter and O'l Mom said that energy is mass X the speed of light squared. This gave me the idea to take a wheelbarrow full of junk and put a flashlight on it with a mirror several yards away. Turn on the flashlight and the light will bounce back at it a tiny bit after you turned on the flashlight. The wheelbarrow is now faster than light! You then just have to square the speed, which is easy as there is 1 speed of light and will be 1 when squared. The junk will then turn into electricity. Try it out for yourself!