Pim van Lommel, a Dutch cardiologist, has studied NDE for a long time and written about it:
https://en.wikipedia.org/wiki/Pim_van_Lommel
The one I like was where an OCD patient went flatline on the hospital bed, went above her body and memorized a 12 digit number way up on the top of the breathing machine.
She later told the nurse about it. The nurse checked on the top of the machine and sure enough, the lady had the 12 digits exactly correct.