What Is This, And Can I Use It

Basically, when transitioning from dreaming to being awake, there is this blank period (for lack of a better term) where I don't feel my waking body and I don't feel my dream body, but I'm aware of the blank period. while in this period I always know that if I just "do this" then I'll wake up, and because my mind isn't very clear I end up "doing this". "This" is usually stretching, which then after stretching, my eyes open and I can feel my body again and I'm awake. Is there anything I can do with this blank period to induce a lucid dream? Is there any existing method using this blank period or even a name for it?