I have lost consciousness several times in my life. Not a pleasurable experience specially as last time I did it because of such extreme pain that I thought I was passing away.
However I have had always recollection of those seconds or minutes when I was unconscious: there was always an intense and quick succession of memories and images accompanied by sound. At some point the external sound from people trying to reanimate me took over and I was able to gain consciousness again.
I always felt that was how the brain acted before passing away, and also how some literature and cinema were right when depicting flashbacks.
However I have had always recollection of those seconds or minutes when I was unconscious: there was always an intense and quick succession of memories and images accompanied by sound. At some point the external sound from people trying to reanimate me took over and I was able to gain consciousness again.
I always felt that was how the brain acted before passing away, and also how some literature and cinema were right when depicting flashbacks.