Two experiences come to mind.
1. The day my mom started coughing up blood in March, 2010, and the day I was told she has lung cancer. The horror of the lung cancer itself, the negativity of the doctors in Lancaster, and the unknown of her prognosis, treatment, and outcome.
2 A second, less significant one, was the time the plane my father and I were on, dropped 1,000 feet, literally, coming into Hartsfield Airport in Atlanta, during a severe thunderstorm, in 1987. I felt like I was on a Free Fall ride at an amusement park somewhere, and I couldnt wait to get off.
Mitch