Drew Tyndell's latest series of digital works — made by painting each frame in Photoshop — could very easily double as hypnosis tools. There's enough going on here, that you could literally miss the rest of this sentence trying to see them all.
There are some less abstract ones, but, for whatever reason, I just find them less engrossing. Maybe the abstract ones act as some kind of movie Rorschach test. You can see more at Tyndell's website.