I had a life changing event such as what you describe.
It looked real, felt real to me.
I have never before had such a powerful hallucination. (That's what everyone calls them..)
It will be 13 years of sobriety on this July 4th.
I detoxed myself at home....which wasn't the smartest thing to do at the time.
The room had filled with people dressed in white and
one such individual had the most beautiful voice and big, brown eyes.
She stared right into my eyes and began saying "Water.....water....."
I began to pass out and the light got brighter for a split second and
she boomed, "WATER!!!"
When I came to, The word Water was repeated until I basically fell from my bed onto the floor
and crawled to the kitchen sink and filled a pitcher of water and drank until I could hold no more..
It struck me later that all I saw fit far too well with what I needed,
a definite wake-up call, and I have never drank alcohol since.
The doctors call me fortunate.
"Sounds like your hallucination saved your life that day."
I believe in Heaven and also that there is a hell.
Not so certain about their descriptions though...................