Youthful dangerous medical issues do happen, and often can only be detected ahead of time with extraordinary medical diagnosis that seldom happens, because there is no reason for it to happen.
The heart can have several such defects that show almost no symptoms, and yet, either through normal functioning, which is pretty strong in its own right, or exercise, suddenly they can lethally appear.
Likewise, blood vessels in the brain can be flawed in all sorts of ways, and suddenly burst, or swell, or just stop the blood flow.
These can cause “dead before you hit the ground” fatalities.
Oh, so true. When I was 25 years old and attending Officers' Basic Training at Ft. Lee, VA, my father had the unpleasant duty of calling me to tell me that a lifelong friend of mine of the same age had just died of a cerebral hemorrage. Someting like that probably happened to this poor woman. We shold all pray fo rher soul and the welfare of her son.