Unfoutunatly at birth, a time travler planted futuristiic high explosives inside him. He hits the detonator from a underwater sea base
Unfortunalty for the scientist he primed the wrong bomb and actually primed the bomb that explodes hi underwater base... He blows up and kills thousands of fish lol jk but he still died
Unfoutunatly it was in the gulf, so it explodes setting off a chain reaction destroying the continental us
the bomb shield emits a radioactive cloud that slowly poisons and mutates anyone left standing into horrible flesh eating zombies. Only I remain untainted. I am legend...
Alex wakes up and realizes the dream he had was a side affect of the zombie gas he screams in agony as he realizes that he too will soon join the horde of zombies the only question on his mind is do I end myself now or do I submit tho the zombie king...
Walks up "hey guys how's it goi---" turns around slowly and runs away to safety and gets on a plane invites all the surviors onto it gets the plane in the air gives the stick to the co pilot and bails out some where over Europe while the plane and all surivuors on it land safely in the U.S.
The Guy is on the run when suddenly, the Joker appears. He offers him a shot of Titan (Arkham asylum reference) Within seconds, the man is gone, and everything is destroyed, except for a sniper hiding behind a rock...