The worker was doing contracted conveyor belt splicing & was kneeling by the belt when he turned to get a hand tool, twisted his knee, heard a pop. He worked for the rest of the day without reporting the incident to his supervisor. He also worked every work day through 7/15/13 & reported the incident on 7/16/13. He's been out of work since 7/17/13 & has filed a workers comp claim.