The Midnight Gospel is insanely good. It's the best thing I've watched in a long time.
I'm a huge fan of Adventure Time so I was really excited when I heard about it, but the trailer is just full of gross imagery and I expected it to be just another stupid gross-for-gross-sake cartoon that I'd probably stop watching after a few episodes. So wrong.
I want to go off-topic and recommend a non-book, Learning to Fly by Missing the Ground[0] (Venkatesh Rao).
And further off the topic, the discussions in The Midnight Gospel were the closest to qualifying as mind-bending experience recently.
[0] https://www.ribbonfarm.com/2014/11/20/learning-to-fly-by-mis...