Shaving People, Punting Things put out another great trailer for the next part of Supernatural.
Update: The music behind this teaser video is from Jensen's Radio Company. As with the best of Supernatural, the music is a huge part of the tension in this video! Here's the music video from their Youtube Page (thank you to Lilah Kane for the tip!):
Tell us your thoughts on this in the comments or in the discussion thread for season 15.