Brent Sommerhauser's sculpture Holding (2008) is one of those one-off works of art set up like a machine; it's too clever for its own good, but it somehow works anyway. This one is a desk with a fan on the wall above it. The rotating fan blows in such a way that a piece of paper on the desktop rises every few seconds to a pair of disembodied folded hands resting on the desk. The hands are made of carved pencils, so the motion of the paper hitting the hands creates a primitive drawing.
At Greg Kucera.