This supercut is a celebration of cinema appearing in the cinema. It's so meta I think my head might explode—but it's oddly compelling at the same time.
Everything from Singin' in the Rain and The Cider House Rules, through The Shawshank Redemption and An American Werewolf in London, to Notting Hill and High Fidelity. Turns out, directors love including movies in movies. [YouTube]