Things that make me go hmmm…

I know this happens to all of you too. You’re reading and an author makes a reference. You get the reference. You think it’s amusing. You give it a little, “Heh,” and read on only to find out the author doesn’t think you understood and begins explaining the reference, in several sentences, and you’re no longer, “Heh” but “Grr.” That. Actually, the book which contained this annoying bit turned out to be pretty good and I ended up liking it in the end but it annoyed me so much I felt the need to mention it.

So, tell me. When you’re reading, what makes you go hmmm?