On the morning of April 6, 1966, approximately 200 students and teachers at Westall State School and the adjacent Grange Reserve in suburban Melbourne witnessed an unidentified craft descend, briefly land in a paddock, and depart at high speed. The object was described as a silver-grey saucer shape with a slight purple hue, roughly the size of two family cars. Multiple witnesses reported that five small aircraft appeared and circled the area during or shortly after the event. The incident lasted approximately 20 minutes and occurred in broad daylight around 11:00 AM local time. In the immediate aftermath, witnesses reported being instructed by school authorities and individuals in plain clothes not to discuss what they had seen. Science teacher Andrew Greenwood, who witnessed the event, was reportedly told to keep students quiet. Physical evidence included a flattened circular area of grass in the paddock where the object reportedly landed. Witnesses have maintained their accounts consistently for decades, with many participating in the 2010 documentary. No official Australian government investigation was made public. Royal Australian Air Force (RAAF) records related to the incident are reportedly incomplete, and attempts to locate official investigation files through freedom-of-information requests have produced limited results. Researchers Shane Ryan and others conducted systematic oral history interviews with surviving witnesses beginning in the 2000s.