Sometimes life ends very abruptly. The sands of time run out, whether you were expecting it or not this morning. A heart attack, you get knocked over by a speeding car, your plane crashes, something falls on your head, you get shot, you slip in the wrong place at the wrong moment. Whatever unexpected thing it is, you're done, you're gone, you're out of here. No last wishes, no last messages to your wife or your kids, and maybe not even a last real moment of awareness, if it's really quick.