'Convulses' in the Bible

and whenever it seizes him [intending to do harm], it throws him down, and he foams [at the mouth], and grinds his teeth and becomes stiff. I told Your disciples to drive it out, and they could not do it.”

and a spirit seizes him, and suddenly he cries out, and it throws him into a convulsion so that he foams at the mouth; and only with [great] difficulty does it leave him, mauling and bruising him as it leaves.