Watchmen: Dr Manhattan over the River Thames!

The video above shows Dr Manhattan really floating over the river Thames.  To celebrate the London premiere of Paramount Pictures projected a 70 foot tall Dr Manhattan onto a water screen:

The water screen, moored especially for this occasion in the middle of the Thames between the London Eye and The Shell Building, created an enormous vertical screen of water that extended to 72 feet in height and 100 feet across (/Film).