There have been times, after being begged yet again for one more bedtime story, I've invented my own alternative endings for Katybeth's favorite fairy tales.
I've been tempted a few times, but I've never gotten quite exasperated enough to do it like Samuel L. Jackson (NSFW warning):
[youtube]http://www.youtube.com/watch?v=U550Gxh5voY&feature=player_embedded[/youtube]
It's Go The F*ck To Sleep, the bedtime story book for exaperated parents!