17 years ago, my Mother was diagnosed with terminal cancer - I was 21 at the time. We knew her time with us was drawing to a close.
When she finally did pass, both my Father and older Sister noticed this whispy 'thing' - like when you are filling your car with gas, there's sometimes a vapourous distortion - this whispy distortion left her head and traveled up the hospital wall and dissappeared above! I didn't notice it as I was focused on a single tear that was falling down her cheek.
That afternoon, the family was discussing the events and my Sister brought up the whispy thing and asked if anyone had seen it. My Dad immediately described it to her. I could tell that they had both seen the same thing.
Makes me think of the "21 grams" theory - oh, and a good movie too.
Creeped out.