Flight Video: Helicopter Defying The Laws Of Physics
May 15, 2008 10:00 
1 Comment » How can this thing fly? No rotor blades turning!
In fact the answer is simple. The camera’s frame rate matches the helicopter’s blade rotation speed.
May 15, 2008 10:00 1 Comment » 
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Helicopter with motionless rotors
well there is no way to defy the law of physics in anyway the frame rate of the camera matches the blade speed on the helicopter making it appear motionless but in reality they are moving like an optical illusion
here are some optical illusions http://www.michaelbach.de/ot/