I also just saw a roleplay description when looking over the nation RP section that was littered with scientific errors:
"Reality has 11 dimensions, as predicted by quantum theory. The higher the dimension, the more apparent power one has. At the 11th dimension there is a membrane from which all began. Is that membrane a sentient being? Perhaps. Is it nothing more than a membrane? Perhaps. Whatever the case, those from higher dimensions are often worshiped as gods and goddesses by those from lower dimensions."
The whole premise is based around the thought that dimensions as predicted by string theory, not quantum mechanics (it is never called quantum theory), are actually separate places, or that beings can be "from" them. This is silly; they're just like the first and second and third dimensions that we see. Just more complex projections of the same objects. A point in the first dimension to a square in the second dimension to a cube in the third to a tesseract in the fourth (in geometry, although really the fourth is time and not spatial). And besides that, the other 7 dimensions would not even be like the kind that we talk about in extra-dimensional geometry (I just made up that name now), but instead places for one-dimensional objects that vibrate throughout those extra dimensions.