@roger,
Yeh. I left med lab work in near desperation from a boss (who liked me and asked me to manage and I said no) who was a good man (and so on) but raged at employees other than a few of us. Well, very few, me and some of the bright folk who worked after their classes checking in specimens. (The two I'm thinking of, one later got a phD at cal tech and another, an emigre from africa, worked his way up in the lab world.) The rest of the place got stings off and on. Rages, followed by pats on backs a while later.
Now I can see this as behavior a psychologist/psychiatrist might be interested in, but then it was tough to be around, especially in a place without windows.
(Ah, I'd be well off now if I had stayed and managed. But I'm almost by definition the exact wrong person to manage personnel past a small group.)