I technically died from a ruptured appendix and spent 9 days in ICU. The doctors delayed surgery to see if the antibiotics would work. This was ~10 or so years ago.
Example: https://www.pennlive.com/midstate/index.ssf/2015/03/union_co...
Another example: http://time.com/3897897/how-an-italian-boy-survived-42-minut...
I drowned as a kid in a friend's pool when I was 7 or 8. I was "technically dead" as well. No afterlife experience, but as I was thrashing underwater, my entire body felt like you feel when your leg goes to sleep, and before I went "to sleep" I got really calm and everything was peaceful. The only thing I could feel other than whole body numbness was a strong warmth. I took one last look up at the sun sparkling on the ripples of water above and closed my eyes.
A few minutes later, I awoke puking water and choking with my best friend shrieking hysterically as her mother frantically performed CPR on me. For some reason, my parents never ever let me swim in her pool again or go to her house unsupervised.
As for afterlife... I don't remember anything from surgery until I woke up 9 days later in the ICU.
The weirdest thing was, I started craving BBQ ribs. I was indifferent to them before.
It was almost an obsession for several months to the point the family got sick of them... I'm glad that's over with.
I've asked a bunch of doctors about it and none of them had answers.
The thinking there is likely part of what saved my life. They put a thing in the huge vein in my neck at the point I opted to attempt to avoid surgery that was used to directly deliver the antibiotics to the brain.