Terrible Script (SPOILERS)
Spoilers in post.
This could have been a really good setup. I cannot believe how bad this movie was.
The movie starts out with a great premise. A man is hired as a security guard, his sole purpose is to watch a door. That's it. He's supposed to watch a door and make sure nothing gets out. He's not told what's in there. And two other guards show up to deliver something. He's only told that if they are not out within a minute, he is to keep the door shut no matter what he hears. They get out in time, but one of them is looking like he was attacked by something. They leave without telling the guy what was in there.
So this was a perfect setup for what could have been a great horror movie, instead, it goes straight down the toilet from there.
The guy's friends show up to visit him at his new job. One of them stupidly steals the door key and disappears inside. Most of the movie is the guy and his friends trying to find their missing friend.
They all appear to start hallucinating. There really didn't seem to be anything supernatural going on. Most of them die because of the hallucinations. And the characters were so stupid, there was nothing redeeming about them. Too stupid to live.
It's not a monster or supernatural movie as far as I could tell. Maybe there's some toxin in the building causing the hallucinations. But it was never explained. This should have been a monster in the dark movie. Instead, it just plain sucked.