I absolutely agree that it was/is extremely fucking weird.
It's been a while since I wrote that comment, but both times I saw this thing... well, its painted basically pitch black, and both times I saw it were at night...
The first time I saw it high overhead, well it has 4 large orangeish/reddish light emmitting areas, 3 near the points of the equilateral triangle, one in its center. There's also the light pollution from the city that makes any clouds not exactly as pitch black as the craft is, so you can silhouette it.
...
The 'theory' on this thing is that the center light is a result of some kind of nonsense scifi bullshit ... device, I guess you'd call it, that basically is both the central powerplant of the craft and... emanates a field, or causes the craft itself (potentially by leveraging some exotic effect on the craft's skin or frame being made of some exotic compound or alloy) to be about 90% less massive than it otherwise would be... and then the 3 lights from the points of the triangle are some kind of rocket (?) thrusters, which are of course now much more potent given the much lower needed TWR.
Thats what I've been able to discern from the... least obviously completely insane articles and well written forum posts / websites over the years of occasional looking into it... but again, I have no fucking clue if any of that is legit at all.
I am by no means a Gordon Freeman type theoretical / exotic materials physicist, all the proposed theories I've read and described seem... potentially not completely insane, to me, a person who probably understands basic physics better than an average random person, who has experience with implementing basic Newtonian physics in game engines and fucking about with more advanced physics mods for Kerbal Space Program, but by no means has any advanced degree in any relevant field.
...
The second time I saw it (again, at night), well it was so low, it was very easy to see it from being so close to all the ground based lights all over the Boeing Field complex... and I could see that it also had many more smaller running lights, like how aircraft have red and green lights for use when near airports or other aircraft in poor visibility conditions.
The absolutely most baffling thing, especially when seeing it so low to the ground, the second time?
No discernible sound. Nothing on the decibel level of a helicopter or jet aircraft, nothing I could really pick out from the road noise of me, being in a car, crossing a bridge, over an industrial area that has various heavy machinery running nearby.