That happened to me in a lucid dream, I think back in my 30s or 40s. It wasn't doing dream yoga at that moment so I'd done nothing to make it happen, just slipped into it.
Normally--odd to describe as normally, I know--you can see yourself in a lucid dream in a certain sense in that you can see your hand or rather the hand of your dream body were you to put your hand up to your face or look down at it in the dream. In fact, that's a way of stabilizing a dream. Another thing you can do is to find a reflective surface, like a body of water or mirror or just a piece of glass and look in there and you actually see a reflection of your dream body looking back. Pretty fun.
But this one time was completely different. Normally, again with the normally, you can interact consciously with dream characters in the dream. Some lucid dreamers, particularly the kids these day, oh those kids, they have sex with them. But you can just have conversations with them just like you would in non dreaming life. They say things that you don't predict they would have said as if they have their own minds.
So this one time my dream setting was in a hotel room or some kind of apartment and there in the room I found myself with me. At first I was in shock. I didn't even know that was possible, but I kept my act together as you have to do, maintaining a proper level of consciousness so that I could remain in the dream while remaining aware of the dream. And I sat down with me and we had us a little chat. I don't recall for how long, not too long, not an hour and it's hard to judge time in a dream anyway. And then I found myself getting too excited about the experience in the dream and I lost control of it, couldn't get it back, waking up my body. And that was it. But I learned that we can meet ourselves, at least, in a dream.