Small creatures scurrying

You look like a chipmunk living in fear that some superior force will swoop down and snatch you up in its talons. But you are a professor, aren't you? You scurry from student to student and glance furtively around at other professors walking by. Have you ever gone to the rat lab over in the pyschology department and seen those poor creatures cower, and then join others in attacking another that has been weakened?

Are you looking for a weak one? But you scurried into your burrow before I could tell.