High speed photography is cool, but this photo of water, spelled out by good ol' H2O is beyond awesome! It's done by photographers Norimichi Inoguchi, Shinichi Maruyama and Wayne Wilson of Biwa, Inc.
http://www.biwainc.com/archive/ (then select Other) - via designboom
and then.. me :) :P
and besides, looks totally loke RF4