Was in bed, half-asleep; felt a sharp, short jolt. My first thought was earthquake, but then I wondered, could it be something else, something more sinister? Perhaps my pacemaker had a meltdown, but quickly ruled that out since I don’t have a pacemaker. Stroke, diabetes, Parkinson’s…? Haven’t had any of these, as far as I know. Relieved to know my first thought was correct. Approaching my mid-70’s – may all future jolts be merely a mild earthquake!