Are you talking to me?

I was in Wal-Mart recently driving along in the motorized shopping cart and verbalizing my thoughts quietly, as is my habit.

"What else do I need?
Oh that's right, permanent markers for a project at school.
No, I can get those next time, I need to hurry now.
Ok - get my list out, so I can get finished."

I was on this very long aisle that spans the whole store and I suddenly noticed this elderly lady ahead of me about ten feet. She looked back at me and then turned around quickly, taking hold of her cart firmly with both hands.

I didn't give it much thought and went on thinking (aloud) until I noticed her looking back at me again. By now I realized that she was feeling a bit nervous about me "following" her.

It was clear that she had heard me talking and wasn't quite sure what to make of me. She looked back one final time and then she turned sharply to the right and quickly disappeared from view.

It all struck me so funny that I just started laughing.