I recently read Out of the Dark by David Weber (of Honor Harrington fame). On the face of it, it seems like your typical "evil invading aliens get pwned by humans" plot. And it goes that way for nearly all of the book.
Until the part where the
OMGWTFvampires show up.
No, I am not kidding. I had a total "WTF Weber?" moment.
Fail, dude. That was made of fail.