Apparently, not even in the Middle Ages - when religious shitheads were running things and ignorance was rampant- did that happen.
http://historymedren.about.com/od/dailyl...d_dead.htm
http://historymedren.about.com/od/dailyl...d_dead.htm
Quote:At no time during the Middle Ages was there a prevalent fear that people were getting buried alive, and in no known instance did anyone rig up a bell-pull to notify the living. Most medieval people were smart enough to distinguish a living person from a dead one. Throughout history there has been the occasional case of someone getting buried alive, but by no means was this as frequent as the hoax would have you believe.