Employee was in break room, turned to pick up drink can, turned twisted knee and felt a ""pop"". Complained of difficulty bearing weight on R leg. Evaluated in medical went home. Returned next day and continued to work regular schedule, not missing any work. Was seen by MD 09/10/2018 and had MRI 09/24/2018. Returned to work from MD visit wearing brace. Last day of work 09/30/2018.