Abstract: At 1:00 p.m. on July 11, 2013, Employee #1 was training a coworker on derrickman operations from the derrick floor. Employee #1 and his coworker had tied off to the platform using a full body harnesses and manila ropes. Employee #1 latched a pipe from the edge of the monkey board and lost their balance when standing up from a squatting position. The rope attached to Employee #1's body harness broke and Employee #1 fell approximately 50 feet before hitting Employee #2 who was standing on the rig floor. Employee #1 was killed with head injuries and Employee #2 suffered bruising to the shoulder and collarbone area.