lucid dreams, sleep paralysis
Huh. Just had a dream that was more lucid than any dream I've had in a long time.
I realized I was dreamy, and that I could 'simulate' pretty much any sensory experience. For some reason, I chose "walking in dry grass", "paddling a boat", and briefly "floating in the water".
Got everything; the crackling noises of the grass, the wavy feeling of the water, the proper directional feelings of movement and muscles - I even adjusted the rowing because it was initially not realistic enough, I was going too fast for the rowing I actually did.
My brain got one detail wrong, though; it believed that I was already half-awake and just lingering in dreamy thoughts, but in reality I'd just *dreamed* being half-awake, and I was still solidly asleep.
I guess that explains why I had difficulty waking up, and why it felt a little like sleep paralysis.