How do you handle a situation where a piece gets damaged by a customer during an art fair? While packing up at my last art fair, I noticed a woman taking one of my business cards from a holder on a shelf. I glanced away & the next thing I hear is a big crash. One of my pieces had fallen off the back of the shelf onto the pavement & broken. The customer looked at me and said "Oh, do you think that happened because of those kids going by?" I just looked at her. What kids? Where? I had just moved that particular piece away from the edge of the shelf a few minutes before the woman came into my shop. Since I didn't see her bump the shelving unit or knock the piece off, I didn't ask her to pay for it. How would you have handled this?