After failing to ignite much box-office heat throughout the rest of the world, the makers of Water Horse: Legend of the Deep have engineered an absolutely stunning last-ditch publicity stunt in Tokyo Bay:
Apparently the effect is created using a combination of lighting, fountains and some sort of water screen. Video of the action can be found here.
Judging from the music: Water Horse is being marketed as some Host-like horror film in Japan. Hopefully screenings will not erupt into chaos when the lovable creature fails to dismember his child co-star on-camera before the end credits.