Clip of the performance by Yoko Ono at the Bluecoat in Liverpool, September 26th 1967. The event, (Ono preferred the this to the term 'happening'), titled 'Music of the Mind' and included the world premiere of 'The Fog Machine'. This video also includes clips of 'Sweep Piece', 'Fly Piece', 'Bag Piece', 'Promise Piece' and 'Fog Piece'.