Will be rather interesting to see what the results show for the Aware NDE study which Dr. Sam Parnia is doing. I have mentioned before one big problem that is a real problem and that is if you were outside your body you wouldn't be worried about looking for a sign. Even though the signs are places in visible range from above the fact remains you wouldn't be concerned about looking at them. The main things you be looking at is your body and the nurses and doctor trying to revive you. Plus the experience itself would take up your priority not signs that are put up.
By the way, I found this interesting video on youtube a show called Beyond Belief where Dr. Sam Parnia is interviewed about his study. The embed link has been disabled so go to youtube to search for it.