The Purge (2013)
Well, this is either the stupidist movie ever or it's a mishmash of something audacious and creative and a slasher film with campy expectations. It doesn't make the grade as a great movie mostly because of an hour of redundant ax-wielding around a big suburban house. But the first half hour is really great—some potential here that went aground fast.
The premise is clear right away: it's the near future, maybe 2021, in the United States. Once a year for twelve hours everyone is allowed to be an ultra criminal without repercussion. None. Kind of like Devil's Night in Detroit without any cops. You can murder, destroy things, be a general naughty boy or girl, and have no criminal consequences the next day. Hurray!
Everything is just okay! Or not.
Well, the reason this works in the first half hour is the calm, steady, well appointed believablility of the acting and scenario in this fancy (upscale American) house. Ethan Hawke plays a great regular, successful, nice Dad. His wife (Lena Headey) is a sweetheart in the clichéd way (she is sadly the typical Hollywood female, incompetent but nice to have around). They have two children in the standard mode, talented and slightly disaffected.
So 7pm rolls around and the family has a fortress of a house (steel doors drop down in front of the windows and doors). So they watch on their monitors the calm and then the lack of calm on the nice street outside, at night. And things go sour badly.
Okay, so a great set up. Of course, if you think about it, it's about as believable as zombies. And so therefore you can go with it if you decide to. So the public can expunge their violence by killing a few people and the other 364 days are crime free. Great. Except, well, uh, really?? Yeah, it implies that we would kill without compunction, and that the next day you would walk by your neighbor, who just killed a few people during the Purge, and say, "Good morning Mrs. Johnson," as if all was fine. And there is no guilt. Or feeling. Or morality.
But that's if you think about it. A lot of Hollywood's idea of the future is not meant to be parsed out and logical. Look at "The Giver," or even (yes) "Avatar." Etc.
So on a simpler level we have the problem of a movie that turns into a slasher film. Because the bad people do, of course, get into the house (you saw that coming) and the family tries to defend itself. This part of the movie is not especially well made, or well acted, or original. It destroys all potential, and makes it a disturbing bore.