White shirt skirts acoss aisle.

Today at my wife's store in Byesville, Ohio, I definitely observed a strange sight. It was early afternoon and a group of customers had just left. I was standing at the checkout station and my wife, facing me, was relating a story one of the customers had told her. Suddenly, across on the other side of the store I distinctly observed a white, long sleeved dress shirt move like it had someone in it down the far aisle toward the forward part of the store. I was startled but managed to say, What's that?" to my wife who had her back to the aisle. By the time she turned to look the form was gone. Telling her what I saw, she replied, "That sort of thing happens frequently. Maybe that sort of thing happens to her frequently but it startled me and I can't say it happens to me frequently. If I recall correctly, and I did see what ever it was for several seconds, it appeared to be a long sleeved, white, dress shirt. But I cannot say that it looked "solid" but on reflection I'd say it was a bit transparent. It moved quickly and was filled out, like someone was in it though no one could be seen. "Chalk it up to this old store being over 100 years old" was my wife's take on the episode. There are no windows on that side of the store. The only window on the side I was on, is a window in the entrance door and it is pretty much blocked by a large "open" sign. There are two windows in the rear of the store on the cash register side but they are heavily obscured and a wall separates them from the front half of the store. No rear windows until you enter the backroom and that door is kept closed. I do not know what I saw. I only know what it looked like.