Steady as she goes

Today is the day for angry students. I'm not sure what I did to merit the hostility I received from more than one quarter today, but it has happened. I'll admit that I'm extra sensitive to these kinds of reactions--I (fairly or not) see myself as a person whose position here is justified in large part because of my good relationships with students. And when I start getting the evil eye from a student or two that I thought I was on good terms with? It's unnerving.