Also known as Cotard’s Syndrome, this rare mental condition has a very bizarre way of changing one’s outlook. It is usually a side-effect of a previous mental illness but occasionally the result of head trauma. What it actually does is make the sufferer believe that they are dead, non-existent or in even rarer cases, immortal.
They simply are convinced that they are in essence, a walking corpse, or ghost. Some conclude, just because it is hot when they gain consciousness, that they have died and gone to hell, even though life goes on normally around them.