Is this normal?

I have an odd way of remembering memories. It's a little bit hard to explain, but here's an example: There was one day where I was out with my friend and we had decided to go to McDonald's. I got a medium vanilla milkshake and she got a large sweet tea. Right when we walked out the door I dropped my milkshake and it exploded all over the place. So just today I was riding in my moms car and we passed by the same McDonald's. I looked at the front door and what I saw was me and my friend replaying the milkshake incident. Then I realized that the two people weren't real and I was watching my memory in third person. That happens with a ton of memories that I have now. Is that supposed to happen?