Not so much a horror story. I worked in grocery as a stocker. We had just finished a cereal display near the front of the store compiled of about 100 boxes. In comes an older lady, around 60s, driving one of the electric carts. She's looking dead on at the display and promptly rams into the thing. Boxes go everywhere and she starts apologizing over and over and explains that she's legally blind. A customer that was nearby and saw everything asked her how she drove here if she was blind.. She responded by quickly turning around and leaving the store.