I was working in the bakery of a supermarket. One day, I was helping a customer with something. She wanted a pumpkin pie. It wasn't available on the floor. So, I went to the freezer and found a frozen pumpkin pie. But she said it was too small. She reported that the pumpkin pie was bigger, and it should be in a white box. I told her that the pie did come with a white box (white boxes were included in the box that stored all the pies in the freezer). I wasn't the person responsible for baking and handling pies, so I was kind of unfamiliar of the stuff; and the person who was responsible for it had gone home for the day. Besides, I couldn't find any larger pumpkin pie. That was the only pumpkin pie variety. Then, she turned her head to the side in frustration and made the sign of the cross. What is that supposed to mean?
What I really want to know is this, how Christians (especially Christians of any denomination who make the sign of the cross) are educated about the sign of the cross, what it can do, and when it is used.