Looked like a mild Tourette's spasm.
I once worked with a colleague who was afflicted by similar behavioral episodes after he had a stroke.
The problem seemed to be controllable with medications and he was still able to work - just not in any position that required contact with the public.
Ever since I hurt my head I wake up with what feels like my WHOLE body shaking and the room moves left to right and back for about a minute or two before it all subsides.
IT sucks lol.
Nobody can figure why it only happens when I wake.
People in early stages of Parkinsons get it but i’ve been cleared of that. Can’t change the past anyhow.
That explains the rope.