I found this on a site i was looking at. Kinda spooky
Martin Sheets was a man who lived a long time ago, when we did not know quite as much about knowing whether a person was really dead or not. Martin Sheets was not so much afraid of death as he was afraid someone thinking he was dead. He was afraid of being buried alive.
This became an obsession. He imagined he could hear the doctor saying "I'm sorry" as he pulled the sheet over Martin's head. He imagined he could feel himself lying in his coffin as the screws of the lid were slowly turned tight. He also imagined he could hear the sound of dirt thudding on the lid of his coffin; the last sound he would ever hear.
Martin Sheets became so obsessed he decided to make sure it would never happen. First he had a special coffin built, one that had interior latches that could be unlocked from inside. He had a massive mausoleum built for his coffin, so dirt would never be thrown on his lid. And to make sure he could get out of his tomb, he paid the telephone company a lot of money to install and maintain a phone inside the tomb. His burial instructions even provided for food to be left in the tomb on his burial day. Then if he was buried alive, all he had to do was snap the special release latches, call someone to get him out, and enjoy a snack while he waited.
Martin Sheets did die and was buried, according to his instructions, in his mausoleum. The phone company operators were a little nervous at first, waiting for Martin to ring. But he never did.
Many years later Martin's wife died. She was found lying on her bed with the phone gripped so tightly in her hand that the attendants had a hard time removing it from her hands. The funeral people went to the tomb to prepare it for her burial. Inside it was exactly as it had been left after Martin Sheet's funeral, the last time it was opened. Except for one thing -- the phone was off the hook.