The promotional stunt on 4 March for new comic-book movie Watchmen created a translucent and shimmering form of Dr Manhattan, against a backdrop of landmarks such as the London Eye and Houses of Parliament.
Other footage from Watchmen was also projected onto the water screen, along with a smiley-face badge, a well-known symbol from the comic.
Beatwax worked with EMF Technology and Capital Pleasure Boats on the stunt.
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Also, check back next week for video coverage of the stunt on Event TV.