One of the Ball Brothers, of the canning jar family, had a great fear of being buried alive. He had a telephone installed in his tomb so he could call out if this happened to him. A few days after he died some of his wife's family got worried because they could only get a busy signal on her phone.
Upon entering her home, they found her dead, a look of fright frozen on her face, clutching the phone. When they went to entomb her after the funeral a couple of days later, the phone inside the crypt was off the hook.