You can hear a few examples:
music/pianosolos/jimmy.improv.mp3
music/pianosolos/6another sunriseimprov.mp3
music/pianosolos/stay insideimprov.mp3
music/pianosolos/december-piano-guitar.mp3
music/pianosolos/speakimprov.mp3
music/pianosolos/rmimprov.mp3