I'm a photographer and I have to say that Andrew is right for several reasons.
Those of us who do high-speed flight photos know we have to set lower shutter speeds than expected so that we can get blurred propellers on planes to show movement. It take practice and patience.
On top of that, remember there are five blades. If the shutter speed is fast enough, it has about a 20% chance of making it look like it's frozen in time. That's a pretty easy to come by chance of making this kind of video.
As for Amanda's comment, she's somewhat right as well, but with different words being used. They do test emergency conditions during helicopter pilot training which involves shutting down all power to the rotors(not stopping the rotors). This is a way to test for the student's emergency training involving "autorotation." It is meant to stop the sudden descent of a helicopter without power, but does not mean that the blades have stopped, only the engine has stopped. See article: http://en.wikipedia.org/wiki/Autorotation_%28helicopter%29
Those of us who do high-speed flight photos know we have to set lower shutter speeds than expected so that we can get blurred propellers on planes to show movement. It take practice and patience.
On top of that, remember there are five blades. If the shutter speed is fast enough, it has about a 20% chance of making it look like it's frozen in time. That's a pretty easy to come by chance of making this kind of video.
As for Amanda's comment, she's somewhat right as well, but with different words being used. They do test emergency conditions during helicopter pilot training which involves shutting down all power to the rotors(not stopping the rotors). This is a way to test for the student's emergency training involving "autorotation." It is meant to stop the sudden descent of a helicopter without power, but does not mean that the blades have stopped, only the engine has stopped. See article: http://en.wikipedia.org/wiki/Autorotation_%28helicopter%29