Once upon a time there was an experiment taken on people with Epilepsy. Apparently, an epileptic fit starts in one part of the brain, and 'spreads' to other parts. The doctors thought that if they physically cut the two hemispheres of the brain, then they could stop the fit spreading to the whole brain.

I believe the part of the brain that joins the hemispheres, and the thing that the doctors cut is called the corpus collosum.

Anyhow, they performed experiments on the patients after the operation. With a board going vertically across the face, so that the eyes are seperated, the patient was shown certain objects on either side of the board. When shown a hammer to the left eye (right brain) the patient couldn't name the object by word, but knew how to use it and demonstrated with their left hand.

So what Im trying to say is, maybe your corpus collosum wasn't working when you woke up?