The Red Shoes (1947)
This is one of those strange ones for me. Second time watching it and I can see that objectively, it really is a fine movie, and I understand why some think it's one of the best ever made. But personally I don't enjoy it too much - well...I do, but for the wrong reasons :p I giggle at the melodramatic absurdity of some of the situations and relish in the extremity of it all. That said, I can't fault the ballet sequence half way through. A fantastic spectacle that begins with delightful, ever so slightly creepy fairytale whimsy and devolves into a trippy LSD infused nightmare. If nothing else, I recommend you watch this scene - a perfect marriage of cinematic magic and stage.