Catfish (out Jan 27) has been described as "the other Facebook movie" and is like going on a new rollercoaster for the first time. You have a rough idea what you're in for but there are going to be a few moments to catch you off guard. This film only works if you know nothing about it before you see it. If you follow that piece of advice (and don't spoil it for others), you're in for an enthralling ride. Grade: A-.