Spider-Man is throwing large objects (blocks of concrete, ...) at the Elemental.
Since the Elemental is a set of drones flying together why aren't they just destroyed when hit by it?
This would at least create a hole in the illusion, if not impede the ability of the Elemental to destroy things around him - uncovering the set-up.
Are the objects thrown at them shot by the drones before they get a chance to touch him? (I do not remember if at any point Spider-Man’s throws were actually successful to hit the Elemental).