I've had this a few times that I remember before.

The strangest time though, I was just at the start of a lucid dream (probably from an accidental WILD thinking about it) and I went to move but felt my real body move, which I could feel was waking me up. So I had to kinda taken on a passive view for a while, just watching stuff happen without being able to move, until I basically drifted deeper into the dream and could eventually move freely. What was particularly fun about it was that when I was just viewing, my mind decided that I was on a rollercoaster, so I was zooming about this landscape while still remaining rigidly still.

This happened during a lie-in, which I generally do all the time at the moment. So I had a full nights sleep, had woken up, and was just drifting in and out of sleep for a coupla hours.

Though I've also had the reverse paralysis as you put it at the end of a normal nights sleep, waking up performing the action I was about to perform in the dream. I seem to remember waking up spitting at one point, though I can't remember why I was going to spit in the dream.

Not a nice way to wake up.