If we put our heads together, maybe we will come up with some other good uses. This could get very interesting!
It has reminded me of when I was a kid and what I did to make pain go away. I used to suffer from severe stomach pain at bedtime when I was very young starting at about 4 or 5. So I somehow made up a way to make it go away. I guess even as a kid I was already using my imagination and visualization techniques! What I did was, I would imagine that a small space ship would come in my room and hover over me. Then a tube would emerge from the underside of the ship and like a vacuum it would suck away the painful parts of my abdomen. As I envisioned all this, I imagined that actual chunks of my body were being removed. Then when all the bad parts were gone, another tube would emerge that would start replacing the parts it had removed, but these parts were perfect and pain free. I used that visualization technique for many years, and got so good at it I could easily see the whole thing in my mind. I never knew at the time how I even came up with that, and also never knew what good practice it would be for using my imagination.
Even at that age, I knew that just concentrating on making the pain go away only made me think of the pain even more--but by using the space ship to make it so I had a body with no pain, that made more sense to me and the pain went away every time. That's just like the idea of "seeing it not there". So that's why I thought of using seeing it not there to make pain go away.
I'm kinda too old to use the space ship anymore.