While standing outside observing the cloud cover, Sunday morning, a giant roar passed overhead from north to south in 1 second. The sound was huge and overtook the sky so fast I doubt many people heard it. The noise came and went and then abrupt silence. The roar sounded like a giant craft. I called the FAA but they didn't know anything. Interesting though, the live DFW tower radar showed no aircraft in this area during that time.