If films like Darren Aronofsky’s “Black Swan” and Terrence Malick’s “Tree of Life” are too strange for you, then for the love of God, stay far away from Guy Maddin’s “Keyhole.” I enjoy the occasional weird flick from time to time, but Maddin’s picture is easily the most bizarre thing I’ve watched in the last few years. And it’s not one of those scenarios where the movie so odd that it’s good. Watching “Keyhole” is like being on drugs. Which specific drugs? Well, all of them.