Filming a movie is not necessary, it is optional. There may
even be alternative ways to film the scene. Those are
things that the FAA will consider before issuing a waiver.

Flying is not necessary either.

It is possible that the scene was filmed in Mexico or some
other country, but that might make it legal, but it is still
unsafe.

I do not agree that it is unsafe, except inasmuch as breathing causes
death. That's a very long lens on the camera; this compresses
perspective. Just like aerobatics demonstrations (which are
unnecessary), the visual tricks fool the viewer into thinking things are
a lot closer than they are.

Jose
--
The monkey turns the crank and thinks he's making the music.
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