I had an interesting thought come across my mind some time ago. What if certain UFOs that are hard to explain how they work or whatever (especially if they look odd, or even mundane (like flying saucers, or weird looking bricks that rotate in the sky)), were in fact portions of a larger dimensional being or craft intersecting with our dimensional plane, or something? So to put it, what if, for a brief moment, a weird spinny thing in the sky was actually the heart of a greater creature (or the engine/generator of a greater device?), but in an abstracted form, only we can observe? What it's doing in this plane, and it's purpose, I am uncertain.
Screwing around in Garry's Mod got me thinking about some of these things as well, when I was just using random stuff like containers welded to spinners, and using them like a machine component (like a Rube Goldberg device); or just seeing how far I launch something by hitting it with a heavy object hard enough (Shipping container golfing). I also had dreams where some UFOs really were parts of a larger machine, just more distributed, and interacting with one another without direct contact (non-euclidean engineering at work? Kinda like how levers in DF can interact with devices regardless of distance, just using 2 mechanisms to connect them; or fine-tuning instruments in Fract OSC.).