Circle (2015)
Fifty strangers wake up in a dark room, where they are standing in two concentric circles and have little memory of how they got there. They immediately learn that unseen forces will vaporize them if they move and that even keeping still is no guarantee of safety; and soon they realize that the group itself is somehow collectively deciding who lives and who dies.
A pretty good dialog-driven sci-fi thriller. Recommended.
>>: B+
Howl (2015)
>>: B