Fede Alvarez’s Don’t Breathe is a command, both to the characters and to us. The housebound thriller tiptoes behind three robbers who break into a blind Army veteran’s home and awaken the angry giant, who grabs a gun and a hammer and nails them inside. If he hears a footstep, he shoots. To survive, the characters get so quiet you can hear their heartbeats. Spooks don’t get more primal.