What's inside of a disco ball?

A disco ball shines in the spotlight and reflects glimmers of happiness and hope onto dance floors everywhere. But what is on the inside? Or in the inside? Is it empty? Barren? Void of internal satisfaction? How sad. Instead, I choose to believe that inside every disco ball is joy, happiness, love or some physical representation of it, or a spark of life from every one of its dance party extravaganzas. Disco balls entertain, yes. Amuse, check. Bring awkward strangers together to slow dance to Marvin Berry and the Starlighters', "Earth Angel," mmm, maybe . . . maybe a good knock-out punch too, now and then.