Stig Ekberg and Harry Sjoberg were driving on the Island of Vaddo, Sweden, when they were approached by a flattened sphere shaped object. It settled in the middle of the road, about 100 meters in front of them. After about ten minutes, the object lifted off and accelerated away. At the landing site, the witnesses found a shiny "rock" that was hot to the touch. It was a three-sided piece of metal about the size of a matchbox, and had a heavy weight. Upon analysis, the object was found to be composed of tungsten carbide and cobalt.