This has happened a lot to me. I wake up during the night and do something, only to think it was a dream the next morning.
One time I woke up and tried to open my bedroom door. It was locked like normal, but I was convinced it was broken. So I kept trying to open the door by hitting the door knob. Then my dad came and told me to go back to sleep.
This one is disgusting. I threw up in this state and managed to walk to the bathroom. There i tried to get all of the vomit off of me. Then all of a sudden the drowsiness went away. I was like “Wtf is this on my arm?!” Then I went into my bedroom and saw I actually did throw up. It was so nasty.