It has happened to me several times when out and about alone or with Jim. Now I realize somewhere along the way I MUST have met the person but I don't have a clue whom he/she is, the name, the circumstance, how long ago or anything. I want to ask "who are you and where do you know me from" but I'm not that brave. It happened once in a store where Jim was in a different aisle. So after the conversation with the stranger ended I went to him, pointed her out and asked if he knew whom she was. He didn't either! Such a weird experience and very unsettling.