I imagine that Domhnall Gleeson will get especially good at being force choked in Episode IX now that he is at the mercy of his new volatile Supreme Leader.
Being choked you might try to pull at the wrist or peel the fingers while a collapsing airway might cause you to suck in for more air or scratch at your throat.
Ultimately, Domhnall Gleeson told USA Today that he played it as if there was not an invisible hand but just that his neck was collapsing in on itself.
While this might seem inconsequential, as Domhnall Gleeson’s comments prove, it actually does impact how an actor physically acts out the scene.