There have been accounts of whats called the Lazerus effect (coming back from the dead)
A particular one i recall is one my English teacher told the class ( sorry parts are vague but i know the gist of it)
A man was Climbing mountains when he fell into a crevas. This man died in that crevas 3 days later he was found and when he was taken back to a hospital a pulse appeared and the man returned to health.
Now you will say "Oh a miracle the invisible hippie did it!" but here one for ya,
The mans head landed in a stream. The motion of the water kept activity of some sort in his brain alive. (thats the vague part i dont recall exactly how it happened..)
That man was lucky his head landed in the stream wasnt he?
(and lol the RROD comment ^)