EE STATED HE WAS IN THE BOTTOM OF THE POCKET ON A STEPLADDER TRYING TO PUSH CURTAIN MATERIAL BACK INTO CHUTE TO PREVENT SPILLAGE WHEN HE SLIPPED AND JUMPED OFF OF STEPLADD, LANDING ON HIS FEET . HE STATED THE IMPACT FROM THE LANDING INJURED HIS BACK AND CHEST. EE'S FIRST LOST WORKDAY DID NOT OCCUR UNTIL 3-26-01.