Hi I know this is a few weeks old now but I had a Near death experience once. Not a super exciting one I should say but I would like to share it anyway.
A good few years back I was in my local with DH (DP at the time) it was mid week after work and not too busy - maybe 10 or so people in. Anyway as would happen sometimes, someone bought a curry and some chapattis for sharing. I took a bit of bread and scooped up what I though was just sauce. Turned out there was a big chunk of lamb on it and it got wedged in my throat.
I couldn't breath and the people around me thought I was turning red and grabbing at my throat because it was spicy, they didn't know I was choking. They where laughing and I realised they weren't going to help. I walked outside for some reason and just sat down on the ground. I still couldn't breath. I remember thinking I was going to die and felt really calm and peaceful. Just accepting that this was it and I was ok with it.
One of the people from the pub came running out and gave me a whack on the back which dislodged the food and I could breath again.
The whole thing was only a minute or so but felt like 5/10 to me. Like the world was in slow motion. The man that ran out after me was at the other end of the pub and watched it happen. He said he had witnessed his younger brother choke and die many years ago and no one had realised what was happening until it was too late. He was just tuned into what it looked like (much like most people don't realise a drowning person is silent and can't scream for help like on tv/movies).
Not sure if that's the sort of thing you are looking for OP, no out of body part for me but most definitely a very calm/ peaceful feeling. I'm sure there would be a scientific/ medical explanation for that- maybe lack of oxygen or something?