It’s amazing what you can learn from reading comments. This picture was taken in Baton Rouge, Louisiana during the flooding of August 2016. There are a few car enthusiasts living in the area. The guy who played the Scooby-Doo voice, Scott Ennis, lives there, and the van was something that was done for a charity. I’ve never watched Supernatural, but I got the joke from this comment: I just imagined Sam and Dean AND Scooby and Shaggy looking at each other and going WTF!
On Tropes in Original Science Fiction Movies, from io9 It never fails lately. We actually get a movie that's a new story, instead of a rehash or continuation of a venerable tale. And people immediately start piling on, pointing out all the stuff in it that's been done before. But just because something contains story elements we've seen before doesn't mean it can't be new.