My mom passed in 2007.She was in the ER overnight with heart arythmia and no one suspected she would die shortly. I came in from out of town and we were all with her in intensive care where they were giving her some drugs to get her heart back in rhythm. She seemed fine otherwise, She was a bit obsessed about the possibility that Hillary might become president, and we talked about that for awhile. Then she mentioned she was worried about “that man” who had been sitting outside her room all night in a wheelchair parked up against the window. She could see it clearly and kept saying how could they let him sit there like that all night and no one was helping him. I did not see anyone in the chair, actually went outside the room to look in it. The last time she mentioned it I said don’t worry about him mom he’s an angel. She just said OK. They came in and shocked her heart as the drugs were not working and she passed.
I’ve heard other stories, where people in hospitals seemed to be ‘attended/watched over’ by what appeared to be ‘other patients’ in some way.