I’m not sure the gyrations will take the exact form you predict, but like you, I believe we’ll be looking at the actions and animations of a caged animal when it comes to morphing this cursed thing into its next, next, and next forms.
I definitely know it will not go quietly.
I think your caged animal description is very accurate. I only tried to imagine what I would do were I him. But as you say, we can only count on him to react in some vicious manner.