It was so awful, she said afterwards, that she went through the whole thing in a daze and didn't feel a thing. But the fact of the matter was that Midge got such a thunderous welcome when she came on to the stage and everything she did thereafter was received with such roars of laughter that she was quite carried away and mimed and danced and acted as if she had been on the stage all her life. So having got through that scene very successfully, she then retired to her bower where she sank down on her flowery couch and went thankfully to sleep. And the only thing was, that she was so tired after the mad rush at the bookshop and so worn out by all that had happened since, that she really did go to sleep. The voices of the actors, the laughter of the audience merged into a distant blur of sound and finally faded away altogether; Midge wriggled herself into a more comfortable position, sighed once and drifted off into oblivion.
From NO TROUBLE FOR SUSAN, Chapter 13, Mad Success. After Susan accidentally sticks a pot onto Charlotte's head, Midge is forced to stand in for her. But Midge is exhausted after a long day at the bookshop and falls asleep after her performance - in full view of the audience!