When Jon wished for something interesting to happen, it could be interpretated by many different ways. But it was interpretated as something very improbable, or what is more, a serie of almost imposible things, to happen. But it would be even more interesting if it was challenging, so Jon, even thought he didn't knew that yet, wouldn't be able to make wishes about it. In fact, he didn't wished to know because his own wish made all people don't think about the wishing stone as a solution, until the wish the condition of the wish became full-filled.
So let choose a point of view to see the chaanges in a more personal way...