The human condition This is a really great little movie. The lead actress is excellent - especially in the first act - and the supporting cast do a fine job, too.
There a lots of little touches in this movie that make it so good. Like in the first act where she is depressed and watching a documentary about The Pyramids being built by aliens, and when she tosses and turns so violently when she tries to sleep.
The second act, after the great reveal, is a little weaker and almost undoes the great opening act, but it is in the final act that the sense of self really shines.
The movie is very philosophical but in a very modern sense. It looks at what we are and what it means to be 'alive'. For me, it gave a sense of how we all share this consciousness and I was deeply moved by the ending.