Stock Photo: A Mexican woman fights with demons during the exorcism ritual performed at the Church of the Divine Saviour on outskirts of Mexico City, Mexico, 31 May 2011 Exorcism is an ancient religious technique of evicting spirits, generally called demons or evil,. A Mexican woman fights with demons during the exorcism ritual performed at the Church of the Divine Saviour on outskirts of Mexico City, Mexico, 31 May 2011 Exorcism is an ancient religious technique of evicting spirits, generally called demon