I did it a few nights ago during a mid-day nap. I was having a lucid dream and I noticed these 3 drawings that I had in my room in real life. I noticed a few other things that were in my room as well, and my arms. I had a weird (and amazing) sensation of being awake and asleep at the same time, being able to change certain aspects of the lucid dream but not others. I wasn't certain what was happening, but I remember wishing that I could remain in this way forever. I didn't know at the time that my eyes were in fact open, but I remember being able to change certain parts of the dream, but not others (thinking back, I was able to change around the scenery in my dream most likely because my walls in my room are white and thus easy to change. I couldn't change things that stuck out more like my backpack or my drawings). I definitely knew at the time that this wasn't like any lucid dream I have had before, because certain things looked SO real, and the feeling was just overall different as I had some sense of external stimuli.

I remember moving my head a bit, and feeling the strange sense of that external stimulus in your inner ear that comes with spinning around. It was quite invigorating! To my surprise I woke up a bit later sitting up with my eyes open!

Has anyone else had a similar experience?