Can confirm I've had that kinda experience in Salvia (and it was great) and while experiencing a long stretch of insomnia and sleep paralysis after cold turkey quitting effexor (and it was terrible and took weeks to return to normal)

This type of trip, where you assume another human’s life for extended periods of time before returning to your own, I’ve only ever seen in salvia reports.

I've had those trips before. I've never taken salvia or any other psychedelic. I don't think I've had a NDE. Possible I've had an OBE and didn't realize it. Happy to know that there are studies of this phenomenon though.

What made mine fucked up was that I was able to see my reflection in some of them. It looked like me but slightly different, like in one I looked like a goth dude with longer hair and a slimmer body, but the person was me! Same black skin and face structure.

If the many worlds interpretation holds true, I may have been dreamwalking. It didn't feel like a dream, it was more like a memory. It was wild.