EMPLOYEE WAS GOING THROUGH A MANDOOR ON STOPE BOTTOM.; MANDOOR & CINDER BLOCK ABOVE DOOR WERE LOOSE, CAUSING DOOR TO FALL OVER AS HE WAS GOINGTHROUGH IT. TOP OF DOOR FRAME AND CINDER BLOCK FELL ON HIS BACK, BACK OF NECK, CAUSING PAIN IN UPPER BACK, BACK OF NECK AND DOWN RIGHT ARM.