I must have been 3 or 4 at the time, I really have no clue. I remember being at a store with my mom (it must've been Target or something, I remember that it was a retail store and not a grocery store). Something caught my eye on one of the shelves and I went to go check it out while my mom was shopping. When I turned around, my mom was gone, and I suddenly became really anxious. In reality, my mom had just gone to the other end of the aisle for a minute, not noticing that I was no longer at her side, however to me it seemed like I was alone for a long time. My mom noticed that I was at the other end of the aisle, grabbed me, and we went on our way.
I remember being that child, but it doesn't seem like me. I don't remember where we were in the store, or even when it was, but I remember looking around me for my mom and suddenly feeling very upset. However, it still does not seem like it was something that I did, but rather feels like something that I had seen before in a movie.
Although our memories are not really similar in content I think they are similar in that we recall specific details, which is odd seeing as it was so long ago, but clearly there were things that really stood out to us. We also both remember the emotions associated with the memory and feel a disconnect with the person in the memory.
My earliest memory is also of getting separated from my mom while shopping. The difference is that I don't remember being afraid, though I do remember my mom being afraid. I was also separated from my mother for a longer time, but I think most of the time I didn't notice because I was looking at a toy or something.
I think such a situation is memorable because it can be a VERY frightening experience, either for the mother or the child or both. While I don't remember being afraid, I probably picked up on the fact that my mother was when we were reunited.