On september 15th at approximately 6:15 p.M. a friend and i heard, and then observed a strange aircraft while sitting on his back deck. the aircraft had a very distinct sound. it sounded like a screeching jet engine with a propeller. after hearing the sound i asked my friend, "what is that". i then turned around and looked over my left shoulde, and saw the aircraft flying approximately 60ft above the ground. the aircraft was approximately 30ft.Long. it had rectangular squared wings approximately 15 ft in each direction. the middle of the aircraft to the tail somewhat resembled a jet, but was sharper and more rounded. the front of the aircraft where a nose would be resembled a hammerhead shark. it was a metallic silver reflective color. from the beginning of the incident where i first heard it, until it was out of my sight lasted about 5-6 seconds. immediately after seeing this my friend posted a brief narrative of what we saw on fb, asking if anyone in our area had seen the craft.