I think I experience it from time to time. I know it's not a listed symptom of bipolar but from lurking here I've read it's not uncommon.

I don't really know how to explain what happens, but I'll try. It feels like there's some sort of disconnect between my mind, my body, and the world. Like I can see things, hear them, feel them, taste them, smell them, but I don't really process that. Every thing seems different, but when I try to pinpoint what it is nothing stands out. I know I'm real and there, but it doesn't feel that way. I can bring myself out of it by intensely focusing on my surroundings and describing them to myself or doing something interactive and narrating it ex: I am typing, this is me coming up with words I want to type, using my fingers to hit the keys, and the keys making words on the screen. Typing isn't a good example because screens don't really feel like reality to me regardless, but you get the point.

Do you dissociate? How would you describe it?