I remember now that my 7th grade friend Warren Fries came face to face with the idea of his mortality while having lunch at his home one mid summer day. He was driven to tears. I was surprised and thought he was unusually old to discover being and not being. At least his mom was there to help at the time. We parted ways after he killed a great snowy white owl the next spring.

I suppose religious training may delay such self realizations.
I think I was about 4 when I had the powerful experience that my life was like a movie and it had a beginning and end.