 CONT: When Alexa is climbing the Lho La ice fall in Nepal, you can  see a overview of the edge where is climbing to. There is nowhere a  helicopter too be seen, yet after 30 seconds (duration of the phone  call) the helicopter manages to land, turn off the engine (spinning  down rotors takes much more than 30 seconds), and let Maxwell  Stafford out of the helicopter and walk towards the edge to meet  Alexa, all without her hearing or noticing a thing.