In the moment of mayhem or in an instant of exquisite fear, people often report being comforted by an invisible companion, what some call a "guardian angel."
But who is the guardian angel?
John Geiger is an internationally known explorer and author who has been investigating this phenomenon for years and said it remains a great mystery.
"The stories are always similar -- that there's a sense of another being, a presence very vividly," Geiger said. "There is never any fear or panic when this...Full Story