EE WAS HOLDING A ROCK DUSTING HOSE WHILE ROCK DUSTING STANDING IN FRONT OF SCOOP. SCOOP WAS BACKING THRU A FLY CURTAIN AND NOTICED THIS BREAK THRU WAS BLOCKED BY ANOTHER PIECE OF EQUIPEMTN. SC OOP OPERATOR THEN POST SCOOP IN FORWARD TRAM POSITION AND TRAMMED FORWARD SEVERAL FEET. INJURED EE DID NOT KNEW THIS AND KEPT WALKING BACKWARDS WHILE DUSTING. SCOOP BLADE HIT INJURED EE OR BA