This case involves a man who was a heavy equipment operator for an excavation company. The man was working at a gravel pit loading material into a hot asphalt plant feeder. As he was on his way to park his loader at the end of his shift, the man received a call to help another crew that was having problems with a jaw crusher. A large rock had become lodged in the jaw crusher. The toggle plate of the jaw crusher was supposed to break when uncrushable material passed through the crusher. The toggle plate did not break and did not act as a safety device. The crew tried to dislodge the rock with a backhoe tooth cut from another piece of equipment and attached to a chain. The tooth then became wedged into the lower end of the jaws along with the rock. When the man tried to remove the tooth, it shot up and struck him in the jaw. The man was left unconscious and his face and neck were seriously injured. The man suffered numerous injuries including extensive head trauma, facial fractures, fractured teeth, lip and facial lacerations, and posttraumatic stress disorder.