THE EE WAS ASSISTING IN REMOVING BROKEN LIFTERS AND WASHING RAW MATERIAL FROM THE DRYER APPRON FEEDER WHEN MATERIAL FLUSHED OUT AND HE WAS PULLED ONTO THE PILE OF LIFTERS THAT HAD BEEN REMOVED AND STACKED TO THE SIDE. WHEN THE EE FELL OVER THE PILE IT BRUISED AND TWISTED HIS LEFT KNEE.