Simpson Falls Britains Alan Simpson , 24 year old groundsman from near Rotherham , Yorkshire , falls on the track after finishing fourth in the Olympic 1 ' 500 Metre final . New Zealand ' s Peter Snell ( No . 466 ) clinched his double in the Games by winning the event . He had already won the Gold for the 800 Metres , John Davies New Zealand ( No 467 ) was third 21st October 1964