Etienne Cliquet created this video of micro-origami unfolding in water, caused by the paper absorbing water through capillary action. Cliquet, a multimedia artist based in Toulouse, France, creates origami diagrams with a computer, folds the designs with tweezers, and places them gently in water and records them unfolding.
He teaches at the Ecole Superieure des Beaux-Arts and has been researching computer-assisted origami since 2004. He describes his work (in English) on his site, Oridigami. DailyMotion has a video interview (in French) with the artist.