EE WAS USING A CABLE COME-ALONG TO LIFT A TRANSMISSION. THE CABLE CRIMP (CLAMP) FAILED, ALLOWING THE LOAD AND CABLE TO SLIP. THE SUDDEN FAILURE CAUSED COME-ALONG FRAME TO STRIKE THE EE IN THE FACE, LACERATING CHIN. MEDICAL TREATMENT FOR LACERATION, SUTURES TO FACE AT CHIN. EE WAS RELEASED FOR FULL DUTY AT TIME OF TREATMENT.