James Napoleon Stone and Theatre Coup d'Etat have never backed away from a theatrical challenge, and they took on a big one with Peter Shaffer's Equus. It's a work with epic scope, incredibly intense characters, and an old mythic take on violence. That made for a heady brew when director Stone took the show to a tiny St. Paul stage. Equus centers on a disturbed young man who has mutilated a prized horse. He matches wits with a psychiatrist who attempts to cure him, but eventually begins to doubt his task — and even his choice of career. Stone marshalled and controlled all of these thoughts and emotions, and kept the production at just the right temperature. It blazed with insight and intensity without burning up.