I fell inconcious (see http://feedback.dayzgame.com/view.php?id=8724 ).
When my friend was next to me and told me that i looked awake, i checked the menu via "escape" key.
I had the option "respawn" enabled, so the game considered me as inconcious.
I noticed that my background was not totally black as in the "you are inconcious" screen. It was almost black but I was able to see my friend movement when passing in front of me and some environnement details.
And as I was able to move and walk while in "uncoucious" screen, I could check my environnement time to time by hitting escape key.