Tom Service explores Ravel's Bolero – a classical chart-topper, concert-hall-filler and the soundtrack to Torvill and Dean's Olympic skating glory. Written in 1928, Ravel described it as a 'piece without music in it' and agreed with the lady at the Paris premiere who shouted 'rubbish! rubbish!' over the applause. But he also admitted that with Bolero he had gambled and won, making one of the most experimental and popular pieces of orchestral music ever composed.