A few more ideas that crossed my mind while sitting in a small dark space playing the cello:
The musical Titanic was heart wrenching and powerful. Naturally all I could think about was how badass it felt to turn my own pages while playing.
I let my attention wander one night while playing The Gondoliers and stumbled upon this terrifying individual in the audience - who. never. smiled. once.
Or physically acknowledged a single joke.
I was tempted to punch him.
Just to see if he moved.
Me and My Girl: I loved this musical. Sometimes my affection for it was at the expense of professionalism.