In the spirit of mischief, I give you,
Genesis of Cremnophobia
In the darkest places, evil dwells. This is was, and thus had it always been.
Millennia ago, a young (for even the ancient were young, once) boy, whom we shall call Steven, set forth on a quest. Steven sought one thing above all else, knowledge, and so that was the goal of his quest.
Unfortunately, after several days of travel, he realized that he had no idea where he was going, nor, for that matter, how to get there. On such small turns of fate does Destiny ride, and on that day, it veritably galloped through his camp.