Throat - singing + drum clip

I worked solely with Johanna today. She did some talking, role playing, animal imitations, painting, singing and drumming. It was a trill when suddenly, out of the blue, Douglas started to join into Johanna's chanting and drumming. They were sitting about 4 yards apart both immersed in their own song. To me it was totally mind-blowing to hear Douglas's throat and nose singing. The audio treat lasted only for a few seconds though.