“A new exercise broke out among us, called the _jerks_, which was overwhelming in its effects upon the bodies and minds of the people. No matter whether they were saints or sinners, they would be taken under a warm song or sermon, and seized with a convulsive jerking all over, which they could not by any possibility avoid, and the more they resisted, the more they jerked. I have seen more than five hundred persons jerking at one time in my large congregations. Most usually persons taken with the jerks would rise up and dance. Some would run, but could not get away. To see those proud young gentlemen, and young ladies dressed in their silks, jewelry, and prunella, from top to toe take the jerks, would often excite my risibilities. The first jerk or so, you would see their fine bonnets, caps, and combs fly; and so sudden would be the jerking of the head that their long, loose hair would crack almost as loud as a waggoner’s whip.”[32] Another revivalist in Kentucky says; “While preaching, we have after a smooth and gentle course of expression suddenly changed our voice and language, expressing something awful and alarming, and instantly some dozen or twenty persons, or more, would simultaneously be jerked forward, where we were sitting, and with a suppressed noise once or twice, somewhat like the barking of a dog. One young woman went round like a top, we think, at least fifty times in a minute, and continued without interruption for at least an hour, and one young woman danced in her pew for twenty or thirty minutes with her eyes shut and her countenance calm, and then fell into convulsions; some ran with amazing swiftness, some imitated the motion of playing on a fiddle, others barked like dogs.” Surely we have here a scene precisely identical in character with that described by Dr. Hecker as having broke out in Germany in 1374. He says: “It was called the dance of St. John or of St. Vitus, on account of the Bacchantic leaps by which it was characterised. The dancers, appearing to have lost all control over their senses, continued dancing, regardless of the bystanders, for hours together in wild delirium, until at length they fell to the ground in a state of exhaustion.... While dancing they neither saw nor heard, being insensible to external impressions through the senses, but were haunted by visions, their fancies conjuring up spirits whose names they shrieked out.”[33] It has happened in some cases, especially in that of women, that they have tried to tear off their clothes, and this explains the account given by those who had attended the Witches’ Sabbath, that many present were stark naked. We know that some of the wilder congregations of the Hussites developed their fanaticism in this form. So did the Anabaptists in Amsterdam.