The Revenant (2009)

After Bart is killed in Iraq, he wakes up to find himself in his coffin in the ground.  Luckily for him, it's the night of his burial and the groundskeepers didn't fill in the grave yet.

Thinking he has been buried alive, he makes his way to his friend Joey's apartment.  Naturally Joey freaks out, but eventually lets Bart in.

When Bart starts barfing dark green liquid, they decide to take him to the emergency room.  This doesn't work out well as the nurse is unnerved by the smell of Bart's decomposition and his lack of vital signs, so she calls the police.

When Bart and Joey go back to Joey's place, Bart stops moving as soon as the sun comes up.  Their friend thinks he must be a vampire and tells Joey to cut off Bart's head.

That night Bart comes back to life again, and they discover that he truly does need blood to keep from decomposing.  After an incident at a corner store, they start targeting criminals and become known vigilantes.

I wanted to like this as it sounds like an interesting concept, but I found it lacking.  It didn't make me laugh and at almost two hours, it was way too long.  If you got rid of the first hour, it would have been much better.  A brief synopsis of the first hour would have been preferable as the movies really gets going when the two start seeking out criminals to kill to get blood to keep Bart from rotting.  Too bad as it's a good idea, but a wasted opportunity.