Horror film, sociopolitical documentary, thriller, historical reconstruction, all wrapped up in non-linear storytelling. This is how Alfonso Cuarón tries to explain all the pieces at play in Felipe Cazals' Canoa: A Shameful Memory. The 1976 Mexican film is, as you can see, hard to describe. And that's only the form. When you go down into the content, things get more complex. The film is a cornerst