I AM LEGEND ... wat happens when...?

I saw the first part of the movie, but then I had to leave durind the second part....
My question is..
WHAT WAS WITH THE MANICAN?!?!?!?!

and does he cure the people or does he DIE?!

First he saw a puppet of his Frank out in the street. He goes crazy and shots the crap outta the puppet, then he falls into a trap that he set. he loses conscience and wakes up just before sun-down. he injures his leg while trying to cut himself off of the trap. he gets to the car just in time before he gets killed by zombie dogs. but his dog sam was infected. later the dog dies. he goes crazy and tries to kill the zombies that killed his dog. he loses and then someone comes and saves his and stitches him up and gets him home. unfortunately the undead followed them home and his house was overran. he gets into the lab and hides behind a bulletproof glass. but the glass almost shatters and then he pulls some blood out of the undead he was trying to cure. gives the cure to the people who saved him and pulls a grenade and dies with all the undead. the ppl he gave the cure to arrives in Vermont and gives the cure to the guards

I don't know

The manicans were just people he talked to. He does both...he dies and finds a cure!! It was really good!!

well we have to assume he does

in the end, he is about to be attacked by zombies and a woman and a child had found him. He hides them and they get away but he cant so he uses a grenade to save them and kill himself and the zombies.

they make it to a place in the north that a survival camp is at.

thats how it ends.. it ends as they enter the place