a random memory...or the little girl with no shadow

There was this children's museum in my hometown that had all kinds of interesting things. One of them was this giant green box that filled the middle of a giant room. People would walk inside of this green box and pose while a person on the outside pushed a button. The light would blink inside of the box and the people's shadows would be frozen on the wall. I remember going in and leaving my own shadow on the wall. When I left the box, I was afraid that I would never get my shadow back. This made me sad, thinking that I would go through life without a shadow. Then I looked at the ground and it was still there.