Elizabeth Olsen gets locked inside an old, dark, creaky lake house. If you ask why, Silent House is so not for you. Logic goes south the minute pretty Sarah (Olsen) lets her dad (Adam Trese) and uncle (Eric Sheffer Stevens) persuade her to get the family’s creepy cabin ready for sale. Zap! She’s trapped for nearly 90 minutes. And so are we. The fun is in the technique. Directors Chris Kentis and Laura Lau, the mischief devils behind the shark-infested Open Water, trail Olsen with a high-def camera through trial by slammed doors, flickering lights and psychological terror. Paranormal Activity has been here before, of course, but Silent House springs tangy new tricks, and Olsen (younger sis of Mary-Kate and Ashley) is a primo scream queen.