At concerts, I'm looking at stuff like the Mike off to the side or guys back stage getting guitars ready. I too went to a play at our local Dinner Theater about a year and a half ago. I was amazed at the teamwork to change sets so quickly. What you said, I can see where there's be high tensions. My Grandfather used to LOVE the Circus as a young man. Not for the Acts, Clowns or animals. He was totally fascinated with how it was put together. He was more interested in how they got the tent up and everything set up than the show itself. Favorite movies of mine....especially old ones....I love to look up photos of behind the scene shots and read the back stories.