'Convulsions' in the Bible

Throwing him into convulsions, the unclean spirit cried out with a loud voice and came out of him.

So they brought the boy to him. When the spirit saw Jesus, it immediately threw the boy into convulsions. He fell on the ground and kept rolling around and foaming at the mouth.

After crying out and throwing him into terrible convulsions, it came out; and the boy became so much like a corpse that most of them said, “He is dead!”