When Igor Stravinsky’s ballet Le Sacre du printemps – The Rite of Spring premiered at the Parisian Champs-Elysées Theatre in 1913, the rite turned into a riot. What was the cause of this consternation? What nerve did Stravinsky and the choreographer Vaslav Nijinsky touch to provoke the audience to jump to its feet — and not in the usual, more positive sense of the phrase?