Real.

Two "invisible workers" remember being in the presence of Bloom ...

As teachers who take pride in lesson planning and deliberate pedagogy, observing those seminar sessions could be frustrating. He tired easily and often had trouble with the Ozzian telecommunication medium. The intelligent and engaged students sometimes struggled to respond to the prompts he posed but did not have the energy to fully elucidate. He recapitulated material from his books or spent much of class asking students to read the plays aloud at length. Perhaps because he notoriously treated characters as if they were real people, he posed questions that seemed puzzling or downright unanswerable.

Be gone, boys.  Remain invisible.