EE WAS OPERATING MAN-LIFT CHANGING LIGHTS THROUGHOUT THE PLANT & TERRAIN WAS ROUGH. EE WAS EXPERIENCING PROBLEMS AROUND 11:00 AM, DID NOT REPORT IT UNTIL 3:00 PM THAT DAY. EE WAS RELEASED TO F ULL DUTY THE SAME DAY. EE HAD FOLLOW UP ON 10/1/02. EE PUT ON LIMITED DUTY UNTIL MORE TESTS COULD BE PERFORMED TO DETERMINE WHAT IS CAUSING DISCOMFORT IN HIS ANKLE.