It's a real cliffhanger

Husband and I went out last night and left the kids with Mom, Dad, and The Sister.  We had dinner and saw Harry Potter and the Deathly Hallows Part 1, which is the first part of a two-part movie made from a single book.  I've read the book a few times and very much looked forward to seeing the film adaptation.  

So we got home, and Dad asked me how I liked it.  I said it was really good and I enjoyed it.  He looked a little perturbed and said, "It's a real cliffhanger, though!"

Um.

Yeah, Dad.  It's half a book.