True.

 BURIED ALIVE

    There was a woman in Kentucky by the name of Octavia Hatcher. After losing her infant son, she fell into a depression and eventually became ill with a sickness that resulted in a coma and her being pronounced dead. Over the course of the next few days more local people fell ill, displaying the same symptoms as Octavia, but eventually recovering. It struck the village that Octavia may have had the same illness and her coffin was dug up, but it was too late: Octavia had been buried alive and when they opened the casket they found the lining of the lid torn from Octavia’s bloody nails as she had attempted to claw her way out. She eventually died of oxygen deprivation, and a life sized monument was erected above her grave by her grieving husband. Apparently being buried alive was pretty common back in the day: some coffins were made with air vents and a bell to ring if you happened to wake up. via chipmunksyndrome