I once saw what looked like a very long blimp shape in the night sky. It was silent, and about the size of a twinkie only not as wide. It had dozens non-blinking, dim, fine blue lights around its circumference. It stayed still for a while, and then moved laterally (which obviously means it was obviously extraterrestrial, obviously) about 20 degrees across the sky before moving very rapidly forward.
At first I thought it might be an anti-stealth blimp or something, but it moved a whole damn lot faster than any blimp I've ever seen, and as far as I know there aren't any other aircraft of that shape. It seemed really big too. And the silhouette was definitely not that of an airplane or helicopter.
Now I don't believe that it was extraterrestrial, but I sure can't think of what it was. I mean, it's obviously an aircraft. But I don't know what would look or act like that.