Soberly Drunk On Power
One of the best ways to meet someone and know his personality most comprehensively is at work or during a trip.
In these particular settings, one would, infact, probably have enough time to guess how that person reacts under pressure, joy, and his core beliefs about life.
In the same way, as in school, someone became known because of their poor test performance, regardless of how much he studied, in the same way, that same kind of people would probably shout at a receptionist when something in their hotel room wasn't perfect as previously imagined.
It wasn't necessarily out of an evil personality, but rather, poor stress management habits.
As Eric somewhat previewed during his previous oniric experience and the following training period, the maids didn't have such problems regarding their mental balance when it came to the moment to perform.
Once again, this fact was showing its results in front of him.