EMPLOYEE WAS STANDING ON THE GROUND NEXT TO AN ELEVATED WORK PLATFORM. A SECOND EMPLOYEE WORKING ON THE PLATFORM WAS USING A HAMMER TO AID A HYDRAULIC PRESS IN MOVING A LARGE COAL MILL PLATE. THE SECOND EMPLOYEE SWUNG THE HAMMER, WHICH GLANCED OFF OF THE PLATE AND HIT THE INJURED EMPLOYEE ON HIS HARDHAT.INITIALLY NOT REPORTABLE.RECENTLY EMPLOYEE RECEIVED MEDICAL TREATMENT FOR NECK.