It strikes me that the smoke in your dream, Mycroft, being green on one side and rising, and red on the other and falling, may well have been indicating "go" (green) for life (rising) and "stop" (red) for death or danger of it happening (falling). The snow and the stuck vehicle may have been feeling frozen in time, possibly...?
My own NDE was very brutal. I was 17, and on the way home from work one night, very late. I worked at an amusement park. This one night, I took a different way to the bus station than usual - I normally rode the metro, but this time I took the bus to the depot. I did that so I could keep chatting with a friend of mine I worked with.
When I arrived at the depot, I got off the bus, and was immediately waylaid by a guy with a gun. He dragged me off and beat me badly, then raped me. He then decided to strangle me to death (despite having the gun) which may have been why I was able to be reanimated.
In any case, as he was strangling me, I began to slip off somewhere else. I found myself bobbing in an ocean. It was night, and the moon was a beautiful crescent in the sky, but very large, and very bright. It was so bright, I could barely stand to look at it.
The water was very warm in that ocean. I floated along, feeling more and more peaceful as time passed. I felt such a supreme feeling of love...I had never felt such love in my life. I felt utterly at home, and at peace. I wanted to stay there forever.
Then a woman's voice spoke to me, it seemed to come from the moon and the sky. She spoke so many loving words, and her voice was the ultimate in compassion. Then she told me I had to return. I was so sad, waves of sadness washed over me - I didn't want to go. I cried out, the moon became painfully bright - I could not look at it at all - then the sky was all terribly bright - and then I woke up.
Two emergency ambulance workers were yelling and fussing and pushing on my chest. There was an oxygen mask being placed on me and taken off me in turns. I began to freak out. My limbs were flailing and I was yelling. I remember being put in the ambulance, then I remember waking up in the hospital.
I asked if I could call my mother. I was groggy and mildly sedated. I thought for sure she would be so so angry at me, as I had missed the last bus home to the suburbs where we lived. My mother arrived at the hospital, took one look at me, and began to cry. I did not understand why she was crying so hard...she brought me to the bathroom, and I looked in the mirror. I had bruises in the shape of hand prints on my neck, and on my face, across my mouth (where he had placed his hand down hard while raping me). I had two black eyes. My nose was horribly swollen, and my lips were split.
I still don't know who found me, or called the ambulance, I guess that is that - it was years and years ago. I guess I am super lucky to have been found. The emergency workers told me they figured I had been dead for about 4 minutes, maybe more. They thought that I had passed out first, then died, which actually bought me some time.
I don't feel "born again" but I do feel lucky to have had a good measure of life, cause dying at 17 would just have been so tragic! Especially for my parents etc. less so for me, cause...once you are dead, well, you are busy elsewhere! But still, I am grateful to have lived, and had a son, and had a lot of animals,and have the love of a good man

a full life, well lived.
They never caught him.