3. Be Careful What You Wish For ... - Pet Semetary
It may sound cliché, but it's so true. You wish for good health, and your friend gets run over by a clown car (see point #12 above). You ask for money and somewhere, some poor schmuck is filling a trash can lid with his evening meal. Why? Because here's my theory: existence can be reduced down to the laws of conservation of mass and energy in an isolated system, energy or mass is neither created or destroyed, it's just redistributed. Same thing applies to life. Every choice in life has conditions that affect the totality of existence. There's no such thing as a free lunch. Grieving Louis Creed's mind was in no shape to consider the cost or ramifications of trying to resurrect his dead son. Ergo, his desire overwhelmed his common sense and instead of his son, something evil was let loose on the world, breaking one of the fundamental laws of nature.