Astronaut playing ?didgeridoo

Interested to hear what people think about this YouTube by Don Pettit: Published on May 31, 2012 by PhysicsCentralAPS. "In his off-duty time, NASA Astronaut Don Pettit likes to explore scientific curiosities of his own design. Sometimes that means cutting his shirt up and playing the space station vacuum cleaner like a didgeridoo." Science off the Sphere: space Soundwaves II - Electric Didgeridoo.