Sitting on his front porch, Jon leaned over the stone that was resting in his hand. Ever since he discovered that he could indeed wish for something that could change the entire planet, he started wondering about all the things he could wish for. But, of course, any wish that changed the world had to have a bad consequence associated with it. If Jon wished that diseases never existed, that would be great. But what if some sort of ailment showed up after the wish was made. If diseases never existed, wouldn't people's bodies not be able to fight off the viruses? With that single good-intentioned wish, Jon could very well kill off every human and animal on the planet.
Thinking that he needed to say it out loud, just to hear the question, Jon said "If I can make a wish to change the world, which one wouldn't have any bad consequences associated with it?"
Suddenly, a shadow fell over Jon. Someone was standing in front of him. He was so engaged in his thinking, that he didn't even notice the person was there until that moment.
A hand snatched the stone from his open hand. "A wish that can change the world, huh?" Jon knew that voice. He looked up and saw ...