Jon was so distraught that he had already forgotten the wish he had made only minutes earlier. But the magickal forces remembered. Jon would have good luck all day. The subconscious adult knowledge that his mysterious benefactor had given him was only the beginning.
Jon found himself driving the car that once belonged to his mother completely by reflex. This has to be the stone's fault, he thought. All this weirdness. Me as an adult. The girl who came downstairs and called me "Dad." I didn't wish for any of that. And there couldn't be any other source of magic in the world ... right? But what if there is? What if there are? What if things are changing all the time and we don't notice them? Lots of guys like me with magic stones, doing who knows what? Imagine such artifacts in the hands of creeps like Biff. He wouldn't have done this, though. Who would? What would the point be of turning me into an adult? A guy who works at ... oh no ...
Jon saw the sign of his employer.