Hmm...this movie ah..mixed feelings about it. When i came out of
the thearter i'm like oh shit i wasted 8 bucks.
On 1 hand, movie no head no tail. Some parts are so unbelivable
(Severely Wounded girlfriend can tahan walking down 47 flights of
stairs and more.. Helicopter trying to escape still fly so low for
the monster to attack at..) that it's more funny than realistic. My
eyes are so tired at some parts of the movie that i just shut them
to rest for awhile.
On another point of view, cool thing is it's filmed entirely to
put you in a first person point of view, like you are in the movie
itself. Not only do they use the shaky camera technique to achieve
this, the way they end so adruptly adds on to this experience as
well. It's like as the characters die, you die with them so u hav
no idea what happen to the monster in the end as well. Similarly,
like the characters in the movie, we have no idea how this monster
came from..etc
Oh ya the guy telling everyone at the party that his best friend
and the girlfriend had sex is damn bastard la 
Actually they got the prequel which is in manga form....best of
all its free......