Artist's charcoal-studded helium balloon creates mysterious wall drawings: "

Artist Karina Smigla-Bobinski has created an installation
comprised of an enormous, helium-filled balloon with a
hedgehog-like coating of charcoal sticks trapped inside a room.

The balloon floats around the room, leaving charcoal marks on
the white walls as it bounces from wall to wall. The piece, called
Ada, is being exhibited at the FILE festival in Sao Paulo.