OPERATOR WAS LOCATED NEAR EE'S MACHINE WANDERING AROUND WITH NO RECOLECTION OF EVENTS THAT TRANSPIRED. ANOTHER EMPLOYEE STARTED TO ASK THE OPERATOR QUESTIONS THAT EE COULD NOT RECALL PERIODS OF TIME OR WHAT EE WAS DOING. THERE WAS A NOTICEABLE CONTUSION ON THE EMPLOYEES HEAD BUT EE COULD NOT REMEMBER HOW IT GOT THERE.