Why am I even watching this?

Rating: 2/10 (10 October 2014)

That was what I kept asking myself for the entire duration. My motives were weaker than those of the killer I had a couple hours to kill, I didn't feel like thinking, the cat was in my lap, those are my only excuses.
I've heard a lot about how great this movie is but I honestly didn't see any indication of it. I was interested in the references to other horror movies, most of which I had seen and many of which I had enjoyed enough to see them multiple times, but that wasn't enough to keep me interested. The one thing in the movie that I thought was sincerely funny was the scene where Henry Winkler (Fonzie, what are YOU doing here??!) as the school principal goes out into the hall muttering some obscenity, and the nearby janitor who's dressed in a green-and-red striped sweater wearing a cruddy brown hat says "what did you call me?", and Winkler replies "sorry, Fred". Now, THAT was FUNNY. One of the two stars I'm giving this movie is for that scene.
Eventually the film turns into a total bloodbath and you lose track of who's dead, who's dying, who's still upstairs, who got out of the house it just all happens so fast it's utterly ridiculous and you stop caring about the whole deal. At least I did. Oh and Matthew Lillard is possibly the most annoying young actor working today. I couldn't wait for him to get murdered and it took way too long.
Disappointing.