Frederick Valentich took off in a Cessna 182L airplane on Oct. 21, 1978, for what was supposed to be a quick 127-mile trip from Melbourne, Australia, to King Island, off the southeast coast of the country. But in the middle of the flight, Valentich contacted air-traffic control to inform them of a bizarre craft that was flying above him. Some of Valentich's transmissions told of a strange object that was hovering on top of him. He said it was not an aircraft. The pilot and his plane were never seen again, and no official explanation for his disappearance was ever given. Theories for Valentich's disappearance include that he was captured by the UFO he reported, or perhaps that he staged his own death, or maybe he simply became disoriented and flew into the sea.