Is it normal to get overwhelming strange feelings when i think of a memory?

This doesn't happen on a regular basis, but at random times. Today, it happened when I first awoke. It's difficult to explain but when I think about a specific detail of a certain time in my past, I get a overwhelming weird/strange/excited/nervous/anxious/relaxing trance-like feeling. And it's only when I think about myself in first person in the memory. Example being this morning, I remembered the off-white colored shower walls of my old best friend/neighbor's new home. This was 10-15 years ago and I just get this warm, weird feeling when I think of standing there and looking at the shower walls. I don't remember any people, nor any further details. Just the shower walls. But it gives me a positive sense of being in my past and I get such a strange feeling, though I try to continue thinking about it because the feeling is pleasant. Anyone else experience this?