I dreamed the way Gregor Mendel got his powers was by throwing himself through the castle's plate-glass windows (in a rain-storm). Then, when he hit bottom: a man with a Ram's head explained his life's mission to him.
Then, also: I was a teacher, teaching this, showing a book on the overhead. Then supposed to ask three questions: 1. What thing like this could happen to you? (How might you die?) 2. Who would appear to you? 3. What would your mission in life be ?
Then, the funny thing, too: that Gregor Mendel doesn't really have powers. He's the guy who studied pea pods [genetics, dominant & recessive). But I'm writing a novel right now--about Hoboes with super-powers. So, that makes sense.