funny and slightly embarrassing

Yesterday I was grabbing a few quick items from the grocery store on my way home from work. I noticed the lady in line behind me was struggling to hold all of her items so I offered to help and took an item from her before she dropped it and she readjusted what was in her arms. I exchanged a few words with her, and suddenly realized that I totally knew her from somewhere. However, I couldn't place her at all. As I started loading my stuff to be checked out she made the connection for me. It was my neighbor. How funny.