I get this sometimes when I wake up at night and once or twice when looking in the mirror. A persistent notion that "wow, this is really weird to be in a body, what a weird experience!" It used to be a little scary, but as I've gotten older I've come to like it. I think it's funny that we call this state "dissociation", when, frankly, not one of us knows what the heck any of "this" is anyway. Is it "real"? What if the dissociative state is actually more like a temporary loss of the illusion of life?

To “be” in a body. What is “in” your body? You could also say “wow it’s really weird to be a body”. The whole self thing seems to be the illusory part. Something like this: https://en.wikipedia.org/wiki/Illusory_contour. You see that white triangle, you experience it, but looking deeper you realise it’s not really there at all. That seems to be what we call “self”, as if it’s a real thing, but it’s not. These experiences are kinda like looking at that triangle, for a brief moment, you “get” it.