Everyone was surprised when Bob died.
Not only was he the youngest of the siblings, but—as he himself would have acknowledged—his reputation as the family health nut was well-earned.
Bob didn't smoke or drink. His diet put everyone to shame. He ran several marathons a year.
When he died at 50, no one could believe it.
The autopsy explained it all.
Unknown to anyone, including himself, Bob had been born with a congenital heart defect. Under normal circumstances, he would have been dead by the age of 30.
By his actions, he'd bought himself an extra 20 years of life.