This time there is a time signature, 3/4, but again no key signature because it would just get in the way. Its marked reverie, quite slow, but there are episodes marked robust, moderate and rather fast.
In the slow sections, he makes time expand and contract, almost stopping at times. In the fast sections, the cello imitates an air raid siren with a wild glissando. At 6:12, he marks it ecstatic, and the piano plays arpeggios while the other instruments play a series of trills. It ends wildly, as a jumble should.