Trapped between life and death

What's the worst thing that can happen to someone?
Not be able to decide whether you live or die. Kept alive for an experiment.

Mark,was an American soldier in WW1. Hit by a landmine,but miraculously surviving,he is now trapped between two worlds. Trapped in his body,haunted by his thoughts.
To his utter horror, the doctors keep him alive. The only thing that he can is chant 'kill me' for the rest of his life

inspired by Metallica:One

Author's note: Careful. To whoever reads the story. It will contain blood and disturbing descriptions that aren't meant for everyone.