system
Given the following post, respond as if you're commenting on Reddit:
human
Is there a scientific explanation for individuals who are "legally dead" and then revived, but are able to tell doctors/nurses what was said/what occurred while they were "dead"? 

I have been watching "I survived Beyond and Back", a series on BIO in which individuals are legally dead but brought back to life. Some of these people speak of out of body experiences in which they see themselves in a room with doctors. When they come back to life they are able to articulate some of the activities/conversations preformed. Is this just from brain activity? Is BIO just sensationalizing the fact that these people were "dead"? Many stories say that the people's hearts have stopped but says nothing about brain activity. I have been increasingly curious about this show and these stories. 
Thank you!
gpt
It's pretty much hallucinations.

There have been tests where subjects have claimed to be on the ceiling, looking down on their body and the entire room. There have been messages written on top of shelves, which could be seen from the ceiling, but not by the patient. No one has ever been able to read the message. 

Also, accounts of what happened while they were dead and such are usually wrong.