With advances in modern medicine no one need fear being mistakenly pronounced dead and then buried alive. But how about being misdiagnosed as in a coma but fully conscious:
A Belgian man thought to have been in a coma for 23 years has told of his "second birth" after doctors realised he was in fact conscious, a German weekly reports.
Medical staff believed Rom Houben had been left in a vegetative state by a serious car accident, but he was simply paralysed and unable to communicate.
It's amazing he didn't go insane.