A nightmare can be anything. From "falling forever" to various "never-ending deaths", there are so many ways this darkness can ominously creep in to your sweet, dormant mind to make your greatest dream into your worst nightmare. This picture depicts the simple "look" of a nightmare as shadows can form into anything and the evil, creepy look can be formed into any happy-looking thing on the outside. Still, that darkness remains hidden until the sweetest and most unexpected time to strike.