Sleepwalking.
I don't remember a thing when my roomy tells me I was up the night before.
I'm clawing at the windows, digging in corners.
I woke up downstairs on the couch and distinctly remember going to bed up stairs that night.
I told her one morning my jaw hurt and she said "Oh, that's because I slapped u last night trying to wake ur ars up".
it's not every night but it still scares me.