Laying “6 feet in the field” is being dead. When you die, your grave is typically dug 6 feet into the ground in most cases.
Also, however, in New Orleans, LA it is required that all graves must be above-ground crypts. The land in New Orleans is rather shallow until you reach the ocean, as well as bowl shaped. Because of this the city often experiences floods, but since graves were never dug that deep because of the shallow land, corpses would often times rise out of the ground and wash through the city, lying in the street when the flood cleared.
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