Here's a comment I made on a thread yesterday that is related to that:
It has been suggested that UFOs might be a form of image projection with a unique kind of mass or substance. This projection could exist primarily in another dimension, intersecting with ours just enough to give it a perceived material presence (solid enough to appear on radar and/or even leave burn marks on the soil). This idea becomes easier to grasp when we remember that what we think of as solid objects are actually collections of atoms bound by electronic forces.
If something from another dimension could manifest similarly—through energy or atomic-like structure—it might give the impression of a tangible, physical object without being one in the conventional sense.
This also offers a possible explanation for why such an object could appear to endure extreme G-forces without destruction; as a projection, it wouldn’t experience forces in the same way a solid object would, allowing it to move or maneuver rapidly without the structural damage we’d expect in physical matter.
Additionally, the beings (grays and even mantis-type beings, et al.) seen around these phenomena might not actually be within the projected 'craft.' Instead, they may step through from this other dimension, appearing alongside or even within these projections in a way that gives the illusion of occupancy. This could suggest that the entire experience—craft and beings alike—is part of a dimensional phenomenon that only partially intersects with our reality, creating a perception of material presence without true physicality.
Well then how are we supposed to shoot them down? Not that we want to of course, but....
That could also be an explanation for spiritual things like ghosts, spirits, demons, banshees and even sasquatch.
STOP STEALING MY BOOK/NOVEL IDEAS