Didn't quite know where to put this, since it doesn't really fit any categories.

When I'm trying to fall asleep, Or occasionally when I'm WILDing, my mind will sometimes wander off to a scene. I'll go with it and immerse myself in an increasingly realistic environment. And then, with no warning, when I make a sudden movement in my mind, I'll make it in real life and completely wake up.

For example, One night I decide to play tennis. After a while, I swung my arm in real life. This also happened a few nights ago when I got punched, and I real life I jerked back violently, about a foot or so.

Does this happen to anybody else, and whats up with it?