Adam and I just watched Moon, a movie I would now recommend.
It's a calm, thought-provoking, mind-bender type. We both really liked it.
It's not scary, or freaky, but it is suspenseful and strange.
(It also ends well...I'm the type that needs to know the general end of a movie so I don't die of heart attack while watching. Oh, and the girl in the movie is named Tess!)