On 08/22/2016 Employee stated EE was in the process of fire bossing when EE was crossing a over cast. In that process, employee went to walk down the steps and slip and twisted EE's left knee. Employee finished EE's shift. On 10/15/2016 Employee missed a day of work due to EE's knee hurting. This incident is being reported as a Lost Time Incident due to the employee missing.