EMPLOYEE WAS WALKING BACK TO EE'S LOADER FROM BREAK WHEN EE SLIPPED AND FELL DOWN LANDING ON EE'S BACK AND HITTING EE'S HEAD ON THE GROUND. WITNESS HELPED EE GET UP. EE WORKED THE REST OF EE'S SHIFT AND WORKED SEVERAL DAYS WITHOUT REPORTING THE ACCIDENT. ACCIDENT WAS REPORTED ON 09/15/2020 WHEN EE WAS EXPERIENCING PAIN IN EE'S NECK AND LEFT SHOULDER AND ARM.