What Happens When We Die?

SEGAspergers, describes a psychedelic journey through multiple dimensions, encountering demons and  and a "life flashing before the eyes" type experience:

"I fell out of the 3rd dimension into...another dimension? It's hard to explain. I could still see the visage of my last images, and the people around me looking at me scared, freaking out. I could see everything from all angles and time. I saw an infinite amount of other views of the same experience with small differences, people looked a little bit different, objects looked a bit weirder. These were all arranged together like a moving fractal. Time was solid, I could look into my past and see random events that happened to me when I was a kid. Obscure stuff that I recognized, but never thought about again. 

[...]

I started to freak out and all the realities around me started to become altered by my fear. REALLY scary shit started appearing like evil demon faces that started biting me. The entities sort of nonchalantly told me that I will manifest whatever I'm feeling. Eventually I decided that I wanted to go back into my reality. I tried to find the one that I fell out of when I died, but I wasn't exactly sure which one it was. I chose the one that I recognised a close friend of mine in and was looking at me sad. I went in and that's when I woke up."

There are some theories that suggest that the "life flashing before the eyes" feeling may be the brain frantically searching its memory banks for a solution to the problem of your imminent death, trying to find a similar experience that might help. Seeing as it is not likely to be something you've experienced before, the brain will shuffle through years and years of data, resulting in the phenomenon of a "life replay".