You could be a somnambulist, if you've found yourself in a precarious position at 4:30 in the morning and have no recollection of getting there.
We've all heard the stories of people getting up out of bed in the middle of the night, still asleep and raiding the refrigerator, cooking, sitting at the kitchen table, eating, cleaning up, talking to others you've woken, then going back to bed, oblivious to the whole spectacle. The person wakes in the morning, not hungry, feeling full and gaining more weight than when they went to bed, and mustard on their breath.
Or how about the story where the person gets up in the middle of the night and in their pyjamas, puts on his jacket gets in the car and goes for a drive, stopping to get gas and to go to the bathroom, completely asleep. Returning safely, parks, goes back to bed.
Somnambulism is an abnormal behavioural disorder of sleep, more common among children, where a person's motor ability still operates (such as sleep walking) while the person is in a deep deep sleep, where there are no dreams. It ends when the sleepwalker returns to bed and in the morning has no recollection of the events that happened during the night.
Dementia and Alzheimer's must feel similar, you would think!
This is very serious. Sleepwalkers occasionally do something wrong, putting themselves and other people in peril.
Not to be mistaken for the DT's. Once after a drunk I woke up on the second shelf in my closet, all curled up in the fetal position. I have no recollection of climbing up and getting in there. It's a tight squeeze.
But then again, I was drunk. I had an excuse. I'm not a somnambulist, or a sleep walker.