I liked Andalou, actually. It's certainly intriguing, if nothing else. Since it's a silent film, you can put any music you want behind it, and it plays as a really fucked up music video. Loves it.
I've been looking into adding more surrealism into my own cartoons, as you know. I've tried it once before, most notably in a Reefer Madness parody that was extremely dark. The kids were completely out of their minds for the entire episode, stealing cars and running down old people. Humorously enough, Screwtape praised that episode highly.