@Sarcasm – The ones I’ve heard are usually pretty accurate, and I amazed myself at the level of detail (i.e. stoichimetric ratios explained, too, etc) to the point where I realised I wouldn’t be able to give such a speech/lecture/explanation if I was wide awake as I don’t have that kind of confidence in waking life!
I sleepwalk too, and have done some strange things in my sleep; soldering (!), polishing shoes, preparing meals, etc. A few years ago I woke up naked in my front garden…just about to shut the front door, so my wife has to lock the door before we go to bed and hide the keys.
I once set up a timelapse video of myself and my wife asleep just to see what goes on. Apart from proving that my wife steals 90% of the bed covers, I’m just laying there with my mouth going ten-to-the-dozen and my arms waving about. Absolutely hilarious to watch! :)