THE SECTION IS PILLARING AND THE EE HAD CUT SOME TIMBERS FOR A BREAKER LINE. AS HE WAS THROWING THE TIMBERS OUT OF THE SCOOP BUCKET ONTO THE RIB IN THE NO. 1 HEADING, HE PULLED A MUSCLE IN HIS LOWER BACK. THE EE STATED HE TWISTED HIS BODY WHEN HE THREW THE TIMBER. THE TIMBER MEASURED APPROX. 56"" LONG X 4"" SQUARE.