For ten points, what instrument's saxophone-like sound in its upper register helped contribute to the riot at the premier of Stravinsky's ballet, The Rite of Spring, in which it plays the opening solo?
Though this instrument does not seem to have great solo capabilities, it has been used notably in several orchestral works.  In Mendelssohn's violin concerto it sustains a pitch from the first movement into the second, and in The Sorcerer's Apprentice, by Dukas, it contributes its distinctive wooden sound to the humorous accompaniment.  For ten points, what instrument's saxophone-like sound in its upper register helped contribute to the riot at the premier of Stravinsky's ballet, The Rite of Spring, in which it plays the opening solo?
Though this instrument does not seem to have great solo capabilities, it has been used notably in several orchestral works.  
Bassoon