Some people here tried to model Escher’s drawings. I think the results are mixed, sometimes even disillusioning (at least for the layman that I am, who didn’t know the tricks). Nevertheless, the whole thing is utterly interesting (alas a bit technical).
This sounds reasonable and I should try it. The rest of the hacks are also interesting (mostly), although some are nonsense (take the “buried alive” one, for example).
As a follow up to the “Do nothing for 2 minutes” post, this time you can chill out for no less than 5 minutes to this cool new dub by my old pal Kalumet, the best psychedelic dj/artist on the entire planet. He hallucinated the whole thing while in Thailand, and the end result is accordingly phenomenal. So take those 5 minutes, listen and enjoy.