Sometimes, the best answer is a more interesting question.

Granny Weatherwaz was a witch. That was quite acceptable in the Ramtops, and no one had a bad word to say about witches. At least, not if he wanted to wake up in the morning the same shape as he went to bed.

Most horses don't walk backwards voluntarily, because what they can't see doesn't exist.

But, in truth, it had not exactly been gold, or even the promise of gold, but more like the fantasy of gold, the fairy dream that the gold is there, at the end of the rainbow, and will continue to be there forever - provided, naturally, that you don't go and look. This is known as finance.

Anger is wonderful. It keeps you going. I'm angry about bankers. About the government.

What's the orbital velocity of the moon?

People like that don't need a reason apart from "because I can". They have a nightmare and try to make it happen.