I haven't seen anyone do this before: painting with sand as a stage performance. Ferenc Cako stands over a glass plate, making images in sand with his hands. Each image gives way to the next in waves of curves and shadows. It's quite a virtuoso performance. The subtlety he manages with such crude tools is amazing.

It reminded me of the pinscreen animation I've seen, like Alexeieff and Parker's A Night on Bald Mountain. I wish I could find an image from that short, it was very impressive.