Don't watch much anime, looking for mindtwist movies.

I'm a little picky about anime, or shows in general, but I really like mindtwisting ones, where you keep having to questioning what is happening. One of my favorites was Paprika, because the whole time you didn't know what was going to happen next.

Does anyone have some good suggestions to watch next? I would prefer movies, if you can, but willing to check out some series.

Thanks for reading!