G major, alla breve, sonata form. Abruptly at the opening, the first theme is presented by the piccolo accompanied by a whip sound, and the piano part's arpeggios commence. While these arpeggios in the right hand follow the main melody and form a G major cadence, the left hand plays what appears to be an F-sharp major chord, a semitone lower, creating tension. The second theme begins with a piano solo and features impressive jazz-like wind instrument passages. Although the development section is very short in relation to the entire movement, the piano plays parts of the first and second themes in a percussive manner and takes the lead. The recapitulation is an extension of the development section, where the first theme is played with percussive sounds by the piano. In the recapitulation of the second theme, after the piano first reveals the full scope of the second theme, the orchestra repeats the latter half of the second theme, followed by short cadenzas for harp and woodwinds, leading into a long piano cadenza. This cadenza deliberately avoids using the themes; instead, the left hand polyphonically plays the closing melody of the exposition with arpeggios, beneath agile trills in the right hand. Finally, from within the piano's percussive figures once again, the first theme emerges played by wind instruments, and the piece concludes brilliantly.