Films with pseudoscientific themes?

I'm looking for recommendations of films that feature pseudoscience, or science that exists within that films own universe but not our own. Films I specifically have in mind are Donnie Darko with the 'Philosophy of Time Travel' and 'Being John Malkovich' with the portal into his mind. I'm not looking for straight-up science fiction but films with a pseudoscientific element in a world similar to ours but slightly strange. Hopefully people can understand what I'm getting at! Can you recommend such films?