In a matter of seconds, life can change from one extreme to another.
Some recent examples that come mind are:
A 4-year old boy wearing Superman pajamas, just diagnosed with a brain tumor.
A 9-year old girl who is scared of doctors, diagnosed with acute appendicitis and in need of surgery.
A 12-day old boy with persistent fussiness with HSV meningitis.
A 13-year old girl playing Candy Crush on her iPad with new-onset diabetes.
A 17-year old boy taking a Calculus final exam in school found unconscious. He was in ventricular tachycardia.