i never saw an object, as i was on my back porch, and i heard "something" coming through the air from the east, heading west. from the time i initially heard it to the time i couldnt hear it in the west anymore, was approximately a second, maybe a second and a half. there was no identifiable sound of a source of propulsion, no propellers, no engine, no jet or rocket that i could hear. the only sound was the sound of it cutting through the air. by the time i heard it and attempted to move so that i could see what it was, it was gone. I see alot of air traffic where i live, including military jets and quite often they scream through here shaking the house and all, but i have never "seen" anything move this fast. probably just a coincidence, but immediately after it passed, all the outside activity seemed to stop.. no birds chirping, no neighbors yelling and beating on the whatever they beat on. I will ask them tomorrow if they saw or heard anything. i was kinda freaked out by it, and normally it takes alot more than a noise to get my hackles raised, so to speak.