Here's an interesting wrinkle. When attempting to hide text, if you happen to select text--for example, text with a heading style applied--and the text has an embedded page break, you get one big blank page smack in the middle of the document. Not exactly the result you want.
So what's the solution? Do a local change to the heading style and then hide the text. If you need to review page breaking, see How many ways can you break a page?