Convulsionnaires of Saint-Médard
The Convulsionnaires (or Convulsionaries) of Saint-Médard were a group of 18th-century French religious pilgrims who exhibited convulsions and later constituted a religious sect and a political movement. This practice originated at the tomb of François de Pâris, an ascetic Jansenist deacon who was buried at the cemetery of the parish of Saint-Médard in Paris.
Source: Wikipedia — Convulsionnaires of Saint-Médard (CC BY-SA 4.0)