What goes up must come down. Thank you Einstein for forever making me feel like a fool. Should the world have been left up to my personal genius, we would probably all still be staring a stone hoping it would turn into a wheel. Luckily, there were men like Isaac Newton who described gravity and the three laws of motion. At some point in my earlier life, I knew the three laws by memory. I just read them over again, and they sound like gibberish. Oh the beauties of age. In any case, Newton began the case for what goes up, must come down. Eistein brought it home with his theory of relativity and whatnot (another source of gibberish for my highly unscientific mind).