I've just discovered that we can die (removing blood) and then come back to life (after pumping the blood back). I've lived until now not knowing this, it's like today I've discovered the world is spherical!
See video at 5:42 => http://www.youtube.com/watch?feature=player_embedded&v=Jq06D0xRWmc
See more about: http://techzwn.com/2011/08/the-soviet-zombie-experiments/