This story happened back when I was about 12 and I am a male.
It was a warm summer afternoon and my mom and I decided to go grocery shopping. As we entered the store, I took notice of a man, wearing a yellow button down, khaki pants, and bright white hair. He must of been at least 50. He stood out to me because he had a wide smile and was staring directly at me. I was always told to be nice to other people so I smiled back and shyly waved at him. His smile somehow got even wider and he waved back.
As we were shopping, I began to notice he was following us, about one car length behind us. He would occasionally grab stuff off the shelves and put it in his cart but still kept pace with us. It was very obvious that he was following us, going every aisle as we did. I was growing increasing uncomfortable, especially whenever my mom would have me stay at the cart when she would get something from a nearby shelf.