I respect your ability to be reasonable.
In short, Near Death Experiences are exactly what the name suggests, a product of a brain dying. They're similar to dreams and hallucinations - A last ditch attempt at making sense of the sensory input coming into it. Also, this is not too unlike a strong religious experience, and why I imagine many religious followers always hearken back to their conversion moment in times of weakness.
Near-death studies - Wikipedia
The Trigger of Extreme Gravity: Dr. James Winnery's NDE Research
I can liken it to being high. Under the euphoria of some narcotics, people experience things that they are convinced were true states of being once they come back to the real world. They walk around for days, weeks, months, or sometimes whole lifetimes convinced that the experiences that they had were visions of a different (or better) reality. DMT comes to mind, right off hand. But I've had fairly similar experiences by just smoking a whole lot of hash...
The problem with those claims is that they are delusional. The variable is the ingesting of a foreign substance, produced to cause those types of experiences. The variable in a NDE, for example, is the extreme stress that the brain is experiencing. In both instances, there are non-normal circumstances occurring and the experiences had while under such duress cannot be equated to those had when normal.
Yes. Good film. Classic sci-fi twist.