The blue box...

Rating: 10/10 (21 May 2015)

The blue box is, within her dream/coma/state of amnesia, a figment of Diane's imagination, representing that knowledge which she would like to uncover (her memory lost in the accident) which she has spent the first half of the film in search of. In the end, it is Betty that supplies her the key, aka, is that which lies at the center of her lost memories. Figuratively speaking, unlocking the blue box is Diane's way of pinching herself in order to wake herself up. And just as pinching one's self in a dream does not actually awaken one's self but is rather just a the part of the dream representing awakening, unlocking the box of course does not actually somehow restore Diane's memory, but merely represents in her dreaming mind the moment of her memory's restoration upon recovering neurologically from the accident. I'm pretty sure the field of psychology has a term for it, but I have no idea what it is...