SPN 6.13: What Do You Get When You Cross a Western with a Neo-Noir with Popcorn Horror??

In this week's Supernatural Talk at Sequential Tart, I geeked out about how Supernatural incorporated the movies Unforgiven and Memento in their episode called "Unforgiven":
http://www.sequentialtart.com/article.php?id=1936

It inspired me to re-watch Unforgiven, one of the bloodiest and thinkiest Westerns ever.