I.E. was standing on the catwalk by the plant feed belt head while other employee moved the belt magnet which caused a rock bar to fall in the direction of I.E. The rock bar struck I.E. in the chest and caused an abrasion. I.E. did get a chest x-ray that was negative. I.E. was told to take a few days off, I.E. did miss three scheduled days and is presently back to work.