EMPLOYEE WAS ASSISTING AN INTERNAL LINER ON A PUMP. ANOTHER EMPLOYEE HAD PRIED THE LINER LOOSE WHEN INJURED PLACED A RATCHET DRIVE HANDLE IN THE OPEN SPACE TO HOLD IT WHILE THE OTHER EMPLOYEE REPOSITIONED HIS PRYBAR. HE APPLIED PRESSURE AND THE DRIVE SLIPPED AND STRUCK HIS UPPER LIP CAUSING A LACERATION WHICH NEEDED STITCHES.