As a child I knew when people were going to die suddenly. It was preceded by a shock like lightening striking my head and travelling to my feet. And I knew.
My mother was horrified and forbade me to speak of it. I never warned anyone. The saddest event was a night when I was baby sitting for a couple I really loved. They had two babies, both girls, under two years old.
As they left for a night out, I was "struck" and knew I would never see her again.
She was struck by a car and killed instantly that night. To this day I wonder if I was meant to warn her.
Whatever the "ability" was, I lost it at about 16 years old.