A scene can mean two things. A scene can be the setting of a story, or (what I think you are referring to) it can be a segment of an Act of a play. A scene separation within a play is usually included in order to allow time for a change in setting during the performance. A chapter is a segment of a book. So, to summarize, a scene is a segment of a play and a chapter is a segment of a book.
It is because flash mobs is a group of people dancing to music and music is art.
The AABA Form, the 32-bar scheme combines into 4 eight bar phrases.
Depending on what comes next, you could use dream.
