Safety meeting, JSA & Toolbox talk with Musta’ed were conducted before operations and work instructions in place Before starting the job, all required pre-checks for the Harness and lanyard were done, and all inspections were completed. While the Derrick Man attempted to latch the joint, he unfortunately lost control of the stand movement. The DM checked the lanyard to ensure that the lanyard's parameters were satisfactory. The DM failed to stop and release the stand when he noticed he had lost control of the stand movement.