I'm Not Saying It Was Aliens, But ...

Did anyone else just hear what sounded like a low-flying airplane with a rumble that lasted so long it could only have come from a very, very, very large airplane, or perhaps something one could even call a spaceship? Because, boy, I just did. At 3:15am. Anyone else? (And no, I wasn't at a holiday party tonight, thus I am not hepped up on free booze, so I wasn't hallucinating. I don't think). Anyway. Anyone? Anyone?