Yes, the "zaps" are scary. They can wake you up. When I told my primary about them, she gave me a puzzled look as did the friends I told. Had to take a step back to adjust tapering off schedule. Am clear for about 6 months but fear sweats, dizziness and falling. Always take and carry sugar aids before I go anywhere. I also have a cane with a collapsible seat. Live alone and go out alone; the fear of falling requires cautious awareness.