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:
Watchmen: Dr Manhattan over the River Thames!
Watchmen: Dr Manhattan over the River Thames!
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: