I'm reading Cory Doctorow's Eastern Standard Tribe. As the romantic relationship between two characters is just about to hit its consumating moment, there's a chapter break. So I dutifully turn the page and see the following:
Vigorous sex ensued.
And then it's on to Chapter 16. I laughed so hard I nearly cried. Clever, perfect for the story, etc., though a small part of me felt cheated, and a slightly larger part than that felt that Doctorow cheated. Still, most of me really really appreciated that single chapter.