EE & OTHER EE'S WERE REMOVING THE FEED HOPPER FROM THE NORDBERG CRUSHER OMNI CONE 1352. EE WAS USING A PRY BAR 51"" LONG AND WEIGHING 15 LBS. THE CRANE WAS ATTACHED TO THE INSIDE OF THE FEED HO PPER AND WAS APPLYING UPWARD PRESSURE. WHEN THE HOPPER WAS TO MOVE EMPLOYEES WERE CAUTIONED TO MOVE AWAY. WHEN THE HOPPER RELEASED INJURED LUNGED FOREWARD AND WAS STRUCK BY THE BAR.