Soldato
Its on a raised beach.
They are shaped like sails and catch wind.
They are light.
If you moved them to a similar shaped location they would do the same.
Why am I wasting my time watching this rubbish ? If the 'academics' have really called in ghost busters, remind me never to get any teaching from those guys.
Not that smart on this are we? It's something else for sure, I don't know.
If it was wind, the others would move as well, if not a little, they pretty much stop moving.