From the Anita Loos novel But Gentlemen Marry Brunettes (1927) in which we read the diary of Lorelei Lee:
Well, a dramatic travelling company had come to San Diego called The Frederick Morgan Players, and one Wednesday afternoon when Dorothy was playing hookey from school, as usual, she attended the matinay. Well, the production that day was called “The Tail of Two Cities” and the gentleman who portrayed the title role was Frederick Morgan himself.
And Frederick Morgan had the type of personality that, as soon as he came out on the stage, everybody knew he was there. Because he had the habit of walking on backwards, so that the audience could not see his face. And as soon as he felt that they could hardly stand the suspence any longer, he would suddenly turn around quick and hold a pose. And Dorothy says that when he did it, the thrill that went down her spine almost made her think that the back of her chair had been wired for electricity.