No more questions? Really?

My students are apparently remarkably calm about this exam I'm giving tomorrow. I've had a big chunk of office hours this morning, but not a soul showed up to ask me anything. Even in class yesterday, one section got out a few minutes early because nobody had anything else to ask. (And I had to resort to torture to draw out the question before that: I started singing until a student asked something to shut me up.) I know there's not a whole lot of new material on this test, but some of it's pretty tricky. I'm surprised.

I guess that means I don't need to worry too much about difficulty level, eh? :)