The girl is literally having myoclonic jerks if you watch right below her knees, I have no idea how one could call this “psychosomatic” just from watching the video; every few seconds they come up and slam full force onto the ground, moving unnaturally (why isn’t all of her leg moving and why are they rigged like that?).

There are a lot of medical things happening from the limited view we have however.

Those are called myoclonic jerks, coming from someone about to graduate as a Neuropsychologist and has juvenile myoclonic epilepsy myself and experiences these before I seize.

They most commonly happen in the limbs; the arms and legs.

When the doctor comes, the doctor immediately turns them on their side. That’s medical protocol for a seizure and loss consciousness.

Edit: not to mention how hard she hits the ground, face-down, no reflexes.