That's Dave Bernabo playing a little ukulele for me. It's really hard to just sit and hold a ukulele and not try to play it; I suggest adding one to liven up any business meeting. In this case, Dave is following a graphic score I drew which looked like several crudely-drawn volcanoes. Later I play the same score on flute and then guitar played with empty beer bottle (both striking and sliding like a big bottleneck slide). Also some flute and singing at the same time. I like this one, as it turns out.
Oh, and it's the first blogpost to have banjo in it. Also played by me.