Yeah, especially lately. We call it the "empty square" - like those puzzle games that you move the squares around to form a picture? There's an empty square so that the pieces can move.
I used to go into complete lockdowns at certain triggers and even though there was plenty of activity in my mind, I couldn't move or speak - sometimes for 30, 45 minutes. So this 'empty square' is forward movement. I can still sort of address people's questions to some degree some of the time. And my body isn't rigid or stone. But yeah, there's "no one home" in the eyes and we stare off into nothingness. It freaked my dr out lately and she called my therapist in. *sigh* I was still nodding in answer to her questions, so I thought I was doing fairly well considering.