I've had quite a few dreams where i have had like supernatural? kinda abilities. For instance the whole being able to jump very long distances and scouring up trees (like edward cullen..now that was an awesome dream), being able to swing from building to building like spiderman. And yeh I can say I've had dreams where i've become lucid and controlled my dream to the point I made myself believe I could cast fireballs and move objects using telekinisis lol. I think its the whole becoming in control of your dream then believing you can do something. If your able to control your dream to an extent then yeh believing you can do something out of the ordinary is a possibility like I was able to.

Goodluck with your method