Some notable stories and movies show characters being buried alive, and then digging themselves out.
This has apparently happened in reality, such as this story: Girl digs self out of grave, points to rapist.
Is such a feat possible for what one would normally consider a grave (i.e. more than one foot (30cm) of dirt)?
I would think it would not take much dirt before one would suffocate and the dirt would become too heavy to move.
If a grave is defined as being dirt cover over a body of at least 1 foot (30cm) deep, could one dig oneself out of a grave, and if so how much deeper could one be buried and still realistically dig oneself out?