You stand up but it makes you dizzy. How long have you been here? You're naked. It's completely dark, darker than you've ever seen, so dark that your visual field is starting to fill up with those hard to place phosphene flashes, like different tones of colorlessness; they even seem to conspire with your inner ear to affect a basic horizonal presentation that you feel you can trust. You need to get some kind of handle on your situation.