“What made life under Caligula especially difficult was that he expected to be applauded, not just by his courtiers but by the whole Roman public, as a great tragic-comic and sporting personality.
Gladiator, singer, dancer, chariot racer, actor: there was nothing he did not excel at. Perhaps there is a touch of Caligula in every showbiz star, but Caligula himself was all Caligula, and nobody who outdid him in performance was likely to live long.
Besides, he was no fool in literary matters. He might rave and shout, but he knew all his references. The emperor had a captive audience, and he knew it. To imagine a more modern, though hardly more threatening equivalent, one should perhaps think of Adolf Hitler singing at Bayreuth, with a member of the Gestapo posted behind each seat in the theater.”
Hughes, Robert. Rome: A Cultural, Visual, and Personal History.