As my class ran under time today and students left about half an hour early, it occurs to me that the decision to cut things short was met with enthusiasm -- not because my students hate taking my classes (I hope!), but they've just been conditioned through years of education to get out of class as soon as possible.
This sort of thing doesn't happen in industry. If I'm working as a game designer and spontaneously decide to take half of the afternoon off, the rest of the team isn't going to heave a sigh of relief that I'm leaving (nor is the publisher, or the client). But here, my "customers" are perfectly happy if I'm not doing the job I get paid to do, at least to a certain point. It's rather unsettling, really.